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Wiedmann, Martin
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The overall goal of Martin's academic program is to develop and communicate the scientific knowledge needed to prevent and control foodborne and zoonotic diseases caused by bacteria. Current work in his laboratory focuses on microorganisms that cause a considerable number of foodborne deaths annually in the US, including Listeria monocytogenes and Salmonella. Listeria monocytogenes causes disease in more than 20 animal species as well as a severe, but rare human foodborne disease with about 250 human deaths annually in the US alone. Salmonella also causes disease in many animals as well as a common foodborne disease in humans with approximately 1 million cases and 380 deaths annually in the US. With his training as a both a veterinarian and food scientist, Martin's programs focus on a comprehensive and interdisciplinary farm-to-table approach to food safety. Martin's academic programs thus involves the application of a variety of disciplines (including microbiology and microbial genetics, population genetics, molecular biology, genomics, evolution and modelling) as well as collaborators from many different discipline (e.g., economics, computer science, veterinary medicine, epidemiology and statistics) and from many different institutions (other universities, state health and agriculture departments, federal agencies such as CDC and USDA, as well as trade organizations).
Research Areas
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Affiliations
administrative responsibilities
- Director of Graduate Studies
member of graduate field
other Cornell affiliations
advisory group member
Extension
has primary specialization area
has secondary specialization area
Research
research overview
- The specific objective of my research program is to develop a better understanding of the pathogenesis, ecology, evolution, and transmission of bacterial foodborne and zoonotic diseases. The pathogenesis of foodborne and zoonotic diseases can involve complex interactions between a bacterial pathogen, a variety of environments and one or multiple host species. The ability of bacterial cells to survive and compete in a variety of environments plays a key role in the pathogenesis and transmission of many foodborne diseases. In addition, selective pressures not associated with mammalian hosts may contribute significantly to the emergence and evolution of virulence characteristics related to the ability of bacteria to effectively infect mammalian hosts. Foodborne zoonotic pathogens provide ideal model systems for studying the ecology of infectious diseases, including adaptation of clonal groups to specific hosts and non-host environments as well as virulence gene expression and maintenance of virulence characteristics under widely varying conditions, including those not directly associated with a host. Current work in my laboratory focuses on two model organisms, including (i) Listeria monocytogenes, which causes disease in more than 20 animal species as well as a severe, but rare human foodborne disease with about 250 human deaths annually in the US alone; and (ii) Salmonella, which causes disease in many mammals as well as a common foodborne disease in humans (1.0 million cases and 300 deaths annually in the US). My research on understanding the biology of foodborne and zoonotic pathogens is a truly interdisciplinary endeavor. My research thus involves the application of a variety of disciplines (including microbiology and microbial genetics, population genetics, molecular biology, genomics, evolution and modelling) and collaborators from different disciplines.
research activities
principal investigator on
- 3M FOOD SAFETY PARTNERSHIP awarded by 3M CORPORATION 2011 - 2012
- A NATIONAL FOOD SAFETY EDUCATION PROGRAM: BUILDING A MULTIDISCIPLINARY FOOD SAFETY TRAINING PIPELINE FROM K-12 TO GRADUATE SCHOOL awarded by NATIONAL INSTITUTE OF FOOD AND AGRICULTURE-USDA 2011 - 2016
- A SYSTEMS APPROACH TO REDUCING SPORE CONTAMINATION IN DAIRY POWDERS awarded by DAIRY RESEARCH INSTITUTE 2011 - 2012
- ASSESSMENT OF NEW DETECTION METHODS FOR FOODBORNE PATHOGENS awarded by MARS CHOCOLATE NORTH AMERICA 2011 - 2013
- CONSUMER SENSORY PERCEPTION OF PASTEURIZED FLUID MILK OVER SHELF-LIFE awarded by DAIRY RESEARCH INSTITUTE 2011 - 2012
- DETERMINATION OF EFFECTIVE COMBINATIONS OF BACTERICIDAL AND BACTERIOSTATIC GROWTH INHIBITOR TREATMENTS AGAINST LISTERIA MONOCYTOGENES ON COLD SMOKED SALMON awarded by NATL OCEANIC AND ATMOSPHERIC ADMINISTRATION, DOC 2012 - 2014
- FOOD SAFETY RESEARCH CONSORTIUM: DEVELOPMENT AND APPLICATION OF MOLECULAR SUBTYPING DATA TO SUPPORT RISK-BASED CONTROL STRATEGIES FOR SALMONELLA AND LISTERIA MONOCYTOGENES awarded by NATIONAL INSTITUTE OF FOOD AND AGRICULTURE-USDA 2010 - 2013
- LISTERIA CONTROL READY-TO-EAT (RTE) MEAT AND POULTRY INDUSTRY: A WHITE PAPER ON THE "SEEK AND DESTROY" PHILOSOPHY awarded by AMERICAN MEAT INSTITUTE FOUNDATION 2012 - 2013
- LISTERIA MONOCYGTOGENES SAMPLES: LISTERIA MONOCYTOGENES, CRONOBACTER SAKAZAKII, AND SALMONELLA REFERENCE STRAIN COLLECTION awarded by INTERNATIONAL LIFE SCIENCES INSTITUTE 2001 - 2014
- MEMORANDUM OF UNDERSTANDING awarded by ALPINA FOODS 2011 - 2012
- PHASE I: IDENTIFICATION OF PSYCHOTOLERANT SPOREFORMER POPULATIONS IN UPSTATE BUFFALO AND UPSTATE ROCHESTER PASTEURIZED MILK awarded by UPSTATE NIAGARA COOPERATIVE INC. 2011 - 2012
- PHENOTYPIC AND MOLECULAR STUDIES TO FACILITATE IMPROVED CONTROL OF L. MONOCYTOGENES AND SALMONELLA TRANSMISSION: FOOD SAFETY RESEARCH CONSORTIUM, NY awarded by NATIONAL INSTITUTE OF FOOD AND AGRICULTURE-USDA 2009 - 2012
- THE ROLE OF RIPARIAN ZONES IN BACTERIA DISPERSAL TO PRODUCE FARMS awarded by UNIVERSITY OF CALIFORNIA DAVIS 2012 - 2014
- THE ROLE OF RIPARIAN ZONES IN BACTERIA DISPERSAL TO PRODUCE FARMS awarded by PRODUCE MARKETING ASSOC 2012 - 2014
co-principal investigator on
- DEVELOPMENT OF A MASTER OF PROFESSIONAL STUDIES IN FOOD SCIENCE WITH PROFESSIONAL SCIENCE MASTERS ADVANCED CERTIFICATION AT CORNELL UNIVERSITY awarded by SLOAN FOUNDATION 2011 - 2012
- MINIMIZING ANTIMICROBIAL RESISTANCE TRANSMISSION: THE DIARY FARM AS THE MODEL SYSTEM awarded by NATIONAL INSTITUTE OF FOOD AND AGRICULTURE-USDA 2010 - 2014
- MINIMIZING MICROBIAL FOOD SAFETY HAZARDS OF FRESH AND FRESH-CUT FRUITS AND VEGETABLES THROUGH A FARM TO TABLE APPROACH awarded by NATIONAL INSTITUTE OF FOOD AND AGRICULTURE-USDA 2008 - 2013
- REGULATORY NETWORKS CONTRIBUTING TO L. MONOCYTOGENES TRANSMISSION AND VIRULENCE awarded by NATL INST OF ALLERGY & INFECTIOUS DISEASE NIH 2002 - 2013
area(s) of concentration/expertise
keywords
- food safety
- foodborne diseases
- genomics
- listeria monocytogenes
- microbial ecology
- microbial evolution
- microbial pathogenesis
- molecular epidemiology
- salmonella
- zoonotic diseases
submitted impact statement
- Understanding farm-to-table Listeria monocytogenes transmission in order to reduce food-borne disease in humans.
- Training the next generation of food scientists: The food science undergraduate summer research program
- Food science research opportunities for undergraduates
- Food Science Research opportunities for Undergraduates
Publications
individual publications
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academic article
- Landscape and Meteorological Factors Affecting Prevalence of Three Foodborne Pathogens in Fruit and Vegetable Farms. . Applied Environmental Microbiology. 79:588-600. 2013
- A decade of improvement: New York State fluid milk quality.. Journal of Dairy Science. 95:7384-7390. 2012
- Clinical features of human salmonellosis caused by bovine-associated subtypes in New York.. Foodborne Pathogens and Disease. 9:796-802. 2012
- Diversity and ecology of Listeria species in urban and natural environments.. Applied Environmental Microbiology. 78:4420-4433. 2012
- Effect of curing method and freeze-thawing on subsequent growth of Listeria monocytogenes on cold-smoked salmon.. Journal of Food Protection. 75:1619-1626. 2012
- Equine stomach harbors an abundant and diverse mucosal.. Applied Environmental Microbiology. 78:2522-2532. 2012
- Evaluation of various selective media for the detection of Pseudomonas species in pasteurized milk.. Journal of Dairy Science. 95:1568-1574. 2012
- Exploration of the role of the non-coding RNA SbrE in L. monocytogenes stress response.. International Journal of Molecular Sciences. 14:378-393. 2012
- FSL J1-208, a virulent uncommon phylogenetic lineage IV Listeria monocytogenes strain with a small chromosome size and a putative virulence plasmid carrying internalin-like genes. Applied Environmental Microbiology. 78:1876-1889. 2012
- Farm animal contact as risk factor for transmission of bovine-associated Salmonella subtypes.. Emerging Infectious Diseases. 18:1929-1936. 2012
- Identification and Characterization of Novel Salmonella Mobile Elements Involved in the Dissemination of Genes Linked to Virulence and Transmission. PLoS One. 7. 2012
- Identification and characterization of psychrotolerant sporeformers associated with fluid milk production and processing.. Applied Environmental Microbiology. 78:1853-1864. 2012
- Listeria monocytogenes and hemolytic Listeria innocua in poultry.. Poultry Science. 91:2158-2163. 2012
- Listeria monocytogenes and hemolytic Listeria innocua in poultry.. Poultry Science. 91:2158-2163. 2012
- Listeria monocytogenes grown at 7°C shows Reduced Acid Survival and an Altered Transcriptional Response to Acid Shock Compared to L. monocytogenes grown at 37°C.. Applied Environmental Microbiology. 78:3824-3836. 2012
- Listeria monocytogenes shows temperature dependent and independent responses to salt stress, including responses that induce cross-protection to other stresses.. Applied Environmental Microbiology. 78:2602-2612. 2012
- Listeria monocytogenes shows temperature dependent and independent responses to salt stress, including responses that induce cross-protection to other stresses.. Applied Environmental Microbiology. 78:2602-2612. 2012
- Real-Time PCR Detection of Paenibacillus spp. in Raw Milk to Predict Shelf-Life Performance of Pasteurized Fluid Milk Products.. Applied Environmental Microbiology. 78:5855-5863. 2012
- Reduction of pasteurization temperature leads to lower bacterial outgrowth in pasteurized fluid milk during refrigerated storage: A case study.. Journal of Dairy Science. 95:471-475. 2012
- Silage collected from dairy farms harbors an abundance of listeriaphages with considerable host range and genome size diversity.. Applied and Environmental Microbiology. 78:8666-8675. 2012
- Stress-induced transcription of σB- and CtsR-regulated genes in persistent and non-persistent Listeria monocytogenes strains from food processing plants.. Foodborne Pathogens and Disease. 9:198-206. 2012
- Structured expert elicitation about Listeria monocytogenes cross-contamination in the environment of retail deli operations in the United States. Risk Analysis. 32:1139-1156. 2012
- A small RNA controls expression of the chitinase ChiA in Listeria monocytogenes. PLoS One. 6. 2011
- A whole genome SNP based approach to trace and identify outbreaks linked to a common Salmonella enterica subsp. enterica serovar Montevideo Pulsed Field Gel Electrophoresis type. Applied and Environmental Microbiology. 77:8648-8655. 2011
- Agar disk diffusion and automated microbroth dilution produce similar antimicrobial susceptibility testing results for Salmonella serotypes Newport, Typhimurium, and 4,5,12:i-, but differ in economic cost. Foodborne Pathogens and Disease. 8:1281-1288. 2011
- Animal contact as source of human non-typhoidal salmonellosis. Veterinary Research. 42:34. 2011
- Diverse Geno- and Phenotypes of Persistent Listeria monocytogenes Isolates from Fermented Meat Sausage Production Facilities in Portugal. Applied and Environmental Microbiology. 77:2701-2715. 2011
- Genome sequencing reveals diversification of virulence factor content and possible host adaptation in distinct subpopulations of Salmonella enterica. BMC Genomics. 12:425. 2011
- Listeriosis outbreak in dairy cattle caused by an unusual serotype 4b Listeria monocytogenes strain. Journal of Veterinary Diagnostic Investigation. 23:155-158. 2011
- Molecular ecology of Listeria monocytogenes and other Listeria species in small and very small ready-to-eat meat-processing plants. Journal of Food Protection. 74:63-77. 2011
- Prevalence, distribution, and diversity of Listeria monocytogenes in retail environments, focusing on small establishments and establishments with a history of failed inspections. Journal of Food Protection. 74:1083-1095. 2011
- Public Health Impact of Listeria monocytogenes Cross-contamination of Deli Meats at Retail Level. Journal of Food Protection. 74:1860-1868. 2011
- Recombination and positive selection contributed to the evolution of Listeria monocytogenes lineages III and IV, two distinct and well supported uncommon L. monocytogenes lineages. Infection, Genetics, and Evolution. 11:1881-1890. 2011
- Results from raw milk Microbiological tests do not predict the shelf-life performance of commercially pasteurized fluid milk. Journal of Dairy Science. 94:1211-1222. 2011
- Salmonella Cerro isolated over the past twenty years from various sources in the US represent a single predominant Pulsed-Field Gel Electrophoresis type. Vet Microbiology. 150:389-393. 2011
- The Listeria monocytogenes B Regulon and its Virulence-Associated Functions are Inhibited by a Small Molecule. mBio. 2. 2011
- The Listeria monocytogenes B Regulon and its Virulence-Associated Functions are Inhibited by a Small Molecule. mBio. 2. 2011
- The transcriptional response of Listeria monocytogenes during adaptation to lactate and diacetate includes synergistic changes that increase fermentative acetoin production. Applied and Environmental Microbiology. 77:5294-5306. 2011
- Variation in Listeria monocytogenes Dose Response in Relation to Subtypes Encoding a Full-Length or Truncated Internalin A. Applied and Environmental Microbiology. 77:1171-1180. 2011
- When cheese gets the blues: Pseudomonas fluorescens as the causative agent of cheese spoilage.. Journal of Dairy Science. 94:3176-3183. 2011
- 10 Year Review of the Food Science Summer Scholars Program: A Model for Research Training and for Recruiting Undergraduate Students into Graduate Programs and Careers in Food Science. Journal of Food Science Education. 9:98-105. 2010
- A population and phylogenetic approach to understand the evolution of virulence in the genus Listeria. Applied and Environmental Microbiology. 76:6085-6100. 2010
- Comparative genomics of the bacterial genus Listeria: Genome evolution is characterized by limited gene acquisition and limited gene loss. BMC Genomics. 2:688. 2010
- Complementation of Listeria monocytogenes with selected Listeria seeligeri virulence genes suggests adaptation of Hly and PrfA function and considerable diversification of prfA regulation in L. seeligeri. Applied and Environmental Microbiology. 76:5124-5139. 2010
- Growth temperature-dependent contributions of response regulators, sigma B, PrfA, and motility factors to Listeria monocytogenes invasion of Caco-2 cells. Foodborne Pathogens and Disease. 7:1337-1349. 2010
- Homopolymeric tracts represent a general regulatory mechanism in prokaryotes. BMC Genomics. 11. 2010
- Listeria marthii sp. nov., isolated from the natural environment, Finger Lakes National Forest. International Journal of Systematic and Evolutionary Microbiology. 60:1280. 2010
- Listeria monocytogenes lineages: genomics, evolution, ecology and phenotypic characteristics. International Journal of Medical Microbiology. 301. 2010
- Listeria monocytogenes sigma B has a small core regulon and a conserved role in virulence but makes differential contributions to stress tolerance across a diverse collection of strains. Applied and Environmental Microbiology. 76:4216-4232. 2010
- Molecular and phenotypic characterization of Listeria monocytogenes from U.S. Department of Agriculture Food Safety and Inspection Service surveillance of ready-to-eat foods and processing facilities. Journal of Food Protection. 73:861-869. 2010
- Multilocus sequence typing of outbreak-associated Listeria monocytogenes to identify epidemic clones. Foodborne Pathogens and Disease. 7:257. 2010
- Prevalence of multidrug resistance is higher among bovine than human Salmonella Newport, Typhimurium and 4,5,12:i:- isolates, but differs by serotype and geographic region in the US. Applied and Environmental Microbiology. 76:5947-5959. 2010
- Pulsed-field Gel Electrophoresis diversity of human and bovine clinical Salmonella isolates. Foodborne Pathogens and Disease. 7:707-717. 2010
- Quantitative Risk Assessment of Listeriosis-associated Deaths due to Listeria monocytogenes contamination of deli meats originating from manufacture and retail. Journal of Food Protection. 73:620-630. 2010
- Salmonella enterica serotype Cerro among dairy cattle in New York: an emerging pathogen?. Foodborne Pathogens and Disease. 7:659-665. 2010
- Salt stress phenotypes in Listeria monocytogenes vary by genetic lineage and temperature. Foodborne Pathogens and Disease. 7:1537-1549. 2010
- Temporal clusters of bovine Salmonella cases at a veterinary medical teaching hospital, 1996-2007. Vector borne and Zoonotic Diseases. 10:471-479. 2010
- The combination of lactate and diacetate synergistically reduces cold growth across Listeria monocytogenes lineages. Journal of Food Protection. 73:631-640. 2010
- Transcriptomic and phenotypic analyses identify coregulated, overlapping regulons among PrfA, CtsR, HrcA and the alternative sigma factors σB, σC, σH, and σL in Listeria monocytogenes. Applied and Environmental Microbiology. 77:187-200. 2010
- Transmission dynamics of a multi-drug resistant Salmonella Typhimurium outbreak in a dairy farm. Foodborne Pathogens and Disease. 7:467-474. 2010
- Use of multiple-locus variable number tandem repeat analysis and phage typing for subtyping of Salmonella Enteritidis from Sporadic Human Cases In the United States. Journal of Applied Microbiology. 108:859-867. 2010
- Contributions of Six Lineage-Specific Internalin-like Genes to Invasion Efficiency of Listeria monocytogenes. Foodborne Pathogens and Disease. 6:57-70. 2009
- Contributions to selected phenotypic characteristics of large species- and lineage-specific genomic regions in Listeria monocytogenes. Food Microbiology. 26:212-223. 2009
- DNA-based subtyping methods facilitate identification of foodborne pathogens. Food Technology. 63:44-49. 2009
- Emergence, distribution, and molecular and phenotypic characteristics of Salmonella enterica serotype 4,5,12:i:-. Foodborne Pathogens and Disease. 6:407-415. 2009
- Fecal Shedding, antimicrobial resistance, and serological response to Salmonella Typhimurium in dairy calves. Journal of the American Veterinary Medical Association. 235:739-748. 2009
- Genome wide evolutionary analyses reveal serotype specific patterns of positive selection in selected Salmonella serotypes. BMC Evolutionary Biology. 9:264. 2009
- Listeria monocytogenes sigma B modulates PrfA-mediated virulence factor expression. Infection and Immunity. 7. 2009
- Modeling of spatially referenced environmental and meteorological factors influencing the probability of Listeria spp. isolation from natural environments. Applied Environmental Microbiology. 75:5893-5909. 2009
- Multilocus variable-number tandem-repeat method for typing Salmonella enterica serovar Newport. Journal of Clinical Microbiology. 47:1934-1938. 2009
- Newly developed workshop series on “Molecular Methods in Food Microbiology”. Food Protection . Food Protection Trends. 29:80-81. 2009
- Physiology and genetics of Listeria monocytogenes survival and growth at cold temperatures. Critical Reviews in Food Science and Nutrition. 49:237-253. 2009
- Prevalence and molecular diversity of Listeria monocytogenes in retail establishments. Journal of Food Protection. 72. 2009
- Quantitative Risk Assessment for Listeria monocytogenes in Selected Categories of Deli Meats: Impact of Lactate and Diacetate on Listeriosis Cases and Deaths . Journal of Food Protection. 72. 2009
- Salmonella 4,5,12:i:-: an emerging Salmonella serotype that represents multiple distinct clones. Journal of Clinical Microbiology. 47:3546-3556. 2009
- Sigma B and sigma L contribute to L. monocytogenes 10403S response to the antimicrobial peptides SdpC and nisin. Foodborne Pathogens and Disease. 6:1057-1065. 2009
- Some Listeria monocytogenes outbreak strains demonstrate significantly lower invasion, inlA transcript levels and swarming motility in vitro. Applied and Environmental Microbiology. 75:5647-5658. 2009
- Extreme value theory in analysis of differential expression in microarrays where either only up- or down-regulated genes are relevant or expected. Genetic Research. 90:347-361. 2008
- Antimicrobial Resistant Salmonella in Dairy Cattle in the United States. Veterinary Research Communication. 33:191-209. 2008
- Comparative analysis of the σB-dependent stress responses in Listeria monocytogenes and Listeria innocua strains exposed to selected stress conditions. Applied and Environmental Microbiology. 74:158-171. 2008
- Contributions of two-component regulatory systems, alternative sigma factors, and negative regulators to L. monocytogenes growth at low temperature. Journal of Food Protection. 71:420-425. 2008
- Development of A Multilocus Variable-Number of Tandem Repeat Typing Method for Listeria monocytogenes Serotype 4b Strains. International Journal of Food Microbiology. 124:239-249. 2008
- Differential regulation of Listeria monocytogenes internalin and internalin-like genes by σB and PrfA as revealed by subgenomic microarray analyses. Foodborne Pathogens and Disease. 5:417-435. 2008
- Genome-wide analyses reveal lineage specific contributions of positive selection and recombination to the evolution of Listeria monocytogenes. BMC Evolutionary Biology. 8:233. 2008
- Growth and persistence of Listeria monocytogenes isolates on the plant model Arabidopsis thaliana. Food Microbiology. 25:698-704. 2008
- Identification of components of the sigma B regulon in Listeria monocytogenes that contribute to acid and salt tolerance. Applied and Environmental Microbiology. 74:6848-6858. 2008
- Lineage specific recombination and positive selection in coding and intragenic regions contributed to evolution of the main Listeria monocytogenes virulence cluster. Infection Genetics and Evolution. 8:566-576. 2008
- Lineage specific recombination rates and microevolution in Listeria monocytogenes. BMC Evolutionary Biology. 8:277. 2008
- Modulation of stress and virulence in Listeria monocytogenes. Trends in Microbiology. 16:388-396. 2008
- Proteomic analyses of a Listeria monocytogenes mutant lacking sigma B identify new components of the sigma B regulon and highlight a role for sigma B in the utilization of glycerol. Applied and Environmental Microbiology. 74:594-604. 2008
- Short-term genome evolution of Listeria monocytogenes in a non-controlled environment. BMC Genomics. 9:539. 2008
- SigmaB and PrfA-dependent transcription of genes previously classified as putative constituents of the Listeria monocytogenes PrfA regulon. Foodborne Pathogens and Disease. 5:281-293. 2008
- inlA premature stop codons are common among Listeria monocytogenes isolated from foods and yield virulence-attenuated strains that confer protection against infection by fully virulent L. monocytogenes strains. Applied Environmental Microbiology. 74:6570-6583. 2008
- Antimicrobial Resistance in non-typhoidal Salmonella. Journal of Food Protection. 70:780-790. 2007
- Characterization of dominant lactic acid bacteria isolated from São Jorge cheese, using biochemical and ribotyping methods. Journal of Applied Microbiology. 103:1838-44. 2007
- Combined sigB allelic typing and multiplex PCR provide improved discriminatory power and reliability for Listeria monocytogenes molecular serotyping. Journal of Microbiological Methods. 68:52-59. 2007
- Culture independent analysis of ileal mucosa reveals a selective increase in invasive Escherichia coli of novel phylogeny relative to depletion of Clostridiales in Crohn's disease involving the ileum. The ISME Journal. 1:403-418. 2007
- Distribution of Internalin Gene Profiles of Listeria monocytogenes Isolates from Different Sources Associated with Phylogenetic Lineages. Foodborne Pathogens and Disease. 4:222-232. 2007
- Evaluation of a tissue culture-based approach for differentiating between virulent and avirulent Vibrio parahaemolyticus strains based on cytotoxicity. Journal of Food Protection. 70:348-354. 2007
- Evaluation of the pathogenicity of Listeria spp. in Caenorhabditis elegans. Foodborne Pathogens and Disease. 4:67-73. 2007
- How university researchers can contribute to Farm-to-Table Risk Assessments: Listeria monocytogenes as an Example. Foodborne Pathogens and Disease. 4:527-537. 2007
- Listeria monocytogenes F2365 carries several authentic mutations potentially leading to truncated gene products, including InlB, and demonstrates atypical phenotypic characteristics. Journal of Food Protection. 70:482-488. 2007
- Listeria monocytogenes fecal shedding in dairy cattle shows high levels of day-to-day variation and includes outbreaks and sporadic cases of shedding of specific L. monocytogenes subtypes. Prev Vet Med. 80:287-305. 2007
- Longitudinal monitoring of Listeria monocytogenes contamination patterns in a farmstead dairy processing facility. Journal of Dairy Science. 90:2517-2524. 2007
- Markov chain approach to analyze the dynamics of pathogen fecal shedding - Example of Listeria monocytogenes shedding in a herd of dairy cattle. J Theor Biol. 245. 2007
- Microarray-based Characterization of the Listeria monocytogenes Cold Regulon in Log- and Stationary-Phase Cells. Applied and Environmental Microbiology. 73:6484-6498. 2007
- Multidrug-resistant Salmonella Typhimurium, Pacific Northwest, United States. Emerging Infectious Diseases. 13:1583-1586. 2007
- Optimal Levels of Inputs to Control Listeria Monocytogenes Contamination at a Smoked Fish Plant. Agribusiness. 23:229-244. 2007
- Phenotypic and transcriptomic analyses demonstrate interactions between the transcriptional regulators CtsR and Sigma B in Listeria monocytogenes. Applied and Environmental Microbiology. 73:7967-7980. 2007
- Pulsed field gel electrophoresis (PFGE) analysis of temporally matched Listeria monocytogenes isolates from human clinical cases, foods, ruminant farms, and urban and natural environments reveals source associated as well as widely distributed PFGE types. Journal of Clinical Microbiology. 45:865-873. 2007
- Recombination and positive selection contribute to evolution of Listeria monocytogenes inlA. Microbiology. 153:2666-2678. 2007
- Recurrent and sporadic Listeria monocytogenes contamination in alheiras represents considerable diversity including virulence attenuated isolates. Applied and Environmental Microbiology. 73:3887-3895. 2007
- Sigma B-dependent and -independent mechanisms contribute to transcription of Listeria monocytogenes cold stress genes during cold shock and cold growth. Applied Environmental Microbiology. 73:6019-6029. 2007
- Temperature-dependent expression of Listeria monocytogenes internalin and internalin-like genes suggests functional diversity for these proteins among the listeriae. Applied Environmental Microbiology. 73:2806-2814. 2007
- The alternative sigma factor σB and the virulence gene regulator PrfA both regulate transcription of Listeria monocytogenes internalins. Applied Environmental Microbiology. 73:2919-1930. 2007
- Transcriptomic and phenotypic analyses suggest a network between the transcriptional regulators HrcA and Sigma B in Listeria monocytogenes. Applied and Environmental Microbiology. 73:7981-7991. 2007
- Contributions of Listeria monocytogenes sigma(B) and PrfA to expression of virulence and stress response genes during extra- and intracellular growth. Microbiology. 152:1827-1838. 2006
- A novel method for same source cluster analysis in phylogenetic trees shows that Listeria monocytogenes contains niche-adapted clonal groups with distinct ecological preferences. Journal of Clinical Microbiology. 44. 2006
- Allelic exchange and site-directed mutagenesis probe the contribution of ActA amino acid variability to phosphorylation and virulence-associated phenotypes among Listeria monocytogenes strains. FEMS Microbiol Lett. 254:300-307. 2006
- Associations among Listeria monocytogenes genotypes and distinct clinical manifestations of listeriosis in cattle. American Journal of Veterinarian Research. 67:616-626. 2006
- Attributing Risk to L. monocytogenes Subgroups: Dose Response in Relation to Genetic Lineages. Journal of Food Protection. 69:335-344. 2006
- Contributions of Listeria monocytogenes σB and PrfA to expression of virulence and stress response genes during extra- and intracellular growth. Microbiol. 152:1827-1838. 2006
- Daily Variability of Listeria Contamination Patterns in a Cold-smoked Salmon Processing Operation. Journal of Food Protection. 69:2123-2133. 2006
- Detection and characterization of Listeria monocytogenes in Sao Jorge (Portugal) Cheese Production. Journal of Dairy Science. 89:4456-4461. 2006
- Exposure to salt and organic acids increases the ability of Listeria monocytogenes to invade Caco-2 cells but decreases its ability to survive gastric stress. Applied Environmental Microbiology. 72:5384-5395. 2006
- Genetic and phenotypic characterization of Listeria monocytogenes lineage III. Microbiology. 152:685-693. 2006
- Implementation of Listeria Controls by Ready-to-Eat Seafood Processors Following a National Workshop Series. Food Protection Trends. 26:89-95. 2006
- Listeria monocytogenes in Multiple Habitats and Host Populations: Review of Available Data for Mathematical Modeling. Foodborne Pathogens and Disease. 3:319-336. 2006
- Listeria monocytogenes internalins are highly diverse and evolved by recombination and positive selection. Infection, Genetics and Evolution. 6:378-389. 2006
- Listeria monocytogenes subgroups IIIA, IIIB and IIIC delineate genetically distinct populations with varied pathogenic potential. Journal of Clinical Microbiology. 44:4229-4233. 2006
- Molecular Epidemiology and Cluster Analysis of Human Listeriosis Cases in Three U.S. States. Journal of Food Protection. 69:1680-1689. 2006
- Molecular characterization of Listeria monocytogenes from natural and urban environments. Journal of Food Protection. 69:93-105. 2006
- Multilocus sequence typing supports that cattle and human associated Salmonella represent distinct and overlapping populations. Applied and Environmental Microbiology. 72:7575-7585. 2006
- Ribotype diversity of Listeria monocytogenes isolates from two salmon processing plants in Norway. Intern J Env Health Res. 16:375-383. 2006
- Sigma B contributes to Listeria monocytogenes gastrointestinal infection but not to systemic spread in the guinea pig infection model. Infect. Immun. 74:876-886. 2006
- The International Life Science Institute North America Listeria monocytogenes strain collection: Development of standard L. monocytogenes strain sets for research and validation studies. Journal of Food Protection. 69:2929-2938. 2006
- Alternative sigma factor sigmaB is not essential for listeria monocytogenes surface attachment. Journal of Food Protection. 68:311-317. 2005
- Alternative sigma factor sigmaB is not essential for Listeria monocytogenes surface attachment. Journal of Food Protection. 68:311-317. 2005
- Alternative sigma factors and their roles in bacterial virulence. MMBR. 69:527-543. 2005
- Ceftiofur resistant Salmonella isolated from dairy farms represent multiple widely distributed subtypes that evolved by independent horizontal gene transfer. J Antimicr Agents Chemo. 49:4061-4067. 2005
- Comparative cell culture and molecular characterization defines genetically distinct attenuation mechanisms in naturally virulence-attenuated Listeria monocytogenes. Applied and Environmental Microbiology. 71:3900-3910. 2005
- DNA sequence-based subtyping and evolutionary analysis of selected Salmonella enterica serotypes. Journal of Clinical Microbiology. 43:3688-3698. 2005
- Evaluation of farm-management practices as risk factor for clinical listeriosis and fecal shedding of Listeria monocytogenes in ruminants. J Am Vet Med Assoc. 227:1808-1814. 2005
- Evolution and molecular phylogeny of Listeria monocytogenes isolated from human and animal listeriosis cases and foods. Journal of Bacteriology. 187. 2005
- Guidelines for Listeria Testing of Environmental, Raw Product and Finished Product Samples in Smoked Seafood Processing Facilities. Food Protection Trends. 25:23-34. 2005
- Listeria monocytogenes in the Chinese food system: strain characterization through partial actA sequencing and tissue culture pathogenicity assays. Journal of Medical Microbiology. 54:217-224. 2005
- Low prevalence of Listeria monocytogenes in human stool. Journal of Food Protection. 68:178-181. 2005
- Molecular subtyping and characterization of bovine and human Streptococcus agalactiae isolates. Journal of Clinical Microbiology. 43:1177-1186. 2005
- Multi-locus sequence typing of Streptococcus uberis provides sensitive and epidemiologically relevant subtypes information and reveals positive selection in the virulence gene pauA. Journal of Clinical Microbiology. 43:2407-2417. 2005
- Multistate outbreak of Listeria monocytogenes infection linked to delicatessen turkey meat. Clinical Infectious Diseases. 40:962-967. 2005
- Select Listeria monocytogenes subtypes commonly found in foods carry distinct nonsense mutations in inlA, leading to expression of truncated and secreted internalin A, and are associated with a reduced invasion phenotype for human intestinal epithelial cells. Applied and Environmental Microbiology. 71:8764-8772. 2005
- The Listeria monocytogenes prfAP2 promoter is regulated by sigma B in a growth phase dependent manner. FEMS Microbiol. Lett. 245:329-336. 2005
- Comparative genomic analysis of the sigB operon. Current Opinion in Microbiology. 48:39-46. 2004
- Distribution of Listeria monocytogenes molecular subtypes among human and food . Journal of Food Protection. 67. 2004
- Ecology and transmission of Listeria monocytogenes infecting ruminants and in the farm environment. Applied and Environmental Microbiology. 70:4458-4467. 2004
- Evaluation of Helicobacter heilmannii Subtypes in the Gastric Mucosa of Cats and Dogs. Journal of Clinical Microbiology. 42:2144-2151. 2004
- Eye infections by Listeria monocytogenes in three cows and one horse. J Vet Diagn Invest. 16:464-469. 2004
- Impact of Intervention Strategies on Listeria Contamination Patterns in Crawfish Processing Plants: A Longitudinal Study. Journal of Food Protection. 67:1163-1169. 2004
- Implementing Targeted Good Manufacturing Practices and Sanitation Procedures to Minimize Listeria Contamination of Smoked Seafood Products. Food Protection Trends. 24:14-27. 2004
- Listeria controls for smoked seafood: Implementing targeted GMP and sanitation procedures to prevent finished product contamination. Trends in Food Protection. 24:302-315. 2004
- Listeria monocytogenes from foods and humans form distinct but overlapping populations. Applied Environmental Microbiology. 70:5833-5841. 2004
- Longitudinal Studies on Listeria in Smoked Fish Plants: Impact of Intervention Strategies on Contamination Patterns. Journal of Food Protection. 67:2500-2514. 2004
- Mathematical model of Listeria monocytogenes cross-contamination in a fish processing plant. Journal of Food Protection. 67:2688-2697. 2004
- Minimizing Listeria Contamination in Smoked Seafood: Training Plant Personnel. Food Protection Trends. 24:953-960. 2004
- Molecular subtyping and tracking of Listeria monocytogenes in Latin-style fresh-cheese processing plants. Journal of Dairy Science. 87:2803-2812. 2004
- Multilocus sequence typing of Listeria monocytogenes using ‘hypervariable’ genes reveals clonal and recombination histories of three lineages. Applied and Environmental Microbiology. 70:2193-2203. 2004
- Natural atypical Listeria innocua strains with Listeria monocytogenes pathogenicity island 1 genes. Applied and Environmental Microbiology. 70:4256-4266. 2004
- Prevalence and Growth of Listeria on Naturally Contaminated Smoked Salmon Over 28 Days of Storage at 4C. Journal of Food Protection. 67:1022-26. 2004
- SigmaB-dependent gene expression and induction in Listeria monocytogenes during osmotic and acid stress conditions simulating the intestinal environment. Microbiol. 150:3843-3855. 2004
- The cost and benefit of Listeria Monocytogenes food safety measures. Critical Reviews in Food Science and Nutrition. 44:513-523. 2004
- Tracking and Control of Listeria monocytogenes in Smoked Fish Processing Plants. Journal of Food Protection. 67:328-341. 2004
- Tracking of Listeria monocytogenes in smoked fish processing plants. Journal of Food Protection. 67. 2004
- Treatment Options to Eliminate or Control Growth of Listeria monocytogenes on Raw Material and on Finished Product for the Smoked Fish Industry. Food Protection Trends. 24:612-619. 2004
- An integrated science-based approach to dairy food safety: Listeria monocytogenes as a model system. Journal of Dairy Science. 86:1865-1875. 2003
- Genome diversification in phylogenetic lineages I and II of Listeria monocytogenes: identification of segments unique to lineage II populations. Journal of Bacteriology. 185:5573-5584. 2003
- Listeria monocytogenes contamination patterns for the smoked fish processing environment and for raw fish. Journal of Food Protection. 66:52-60. 2003
- Listeria monocytogenes sigma B regulates stress response and virulence functions. Journal of Bacteriology. 185:5722-5734. 2003
- Molecular subtyping to detect human listeriosis clusters. Emerg. Infect. Dis. 9. 2003
- Pathogen, host, and environmental factors contributing to the pathogenesis of listeriosis. Cellular and Molecular Life Sciences. 60. 2003
- Role of σB in regulating the compatible solute uptake systems of Listeria monocytogenes: Osmotic induction of opuC is σB dependent. Applied and Environmental Microbiology. 69:2015-2022. 2003
- Sigma(B)-dependent expression patterns of compatible solute transporter genes opuCA and lmo1421 and the conjugated bile salt hydrolase gene bsh in Listeria monocytogenes. Microbiology. 149:3247-3256. 2003
- Microtiter Plate Assay for Assessment of Listeria monocytogenes biofilm formation. Applied and Environmental Microbiology. 68:2950-2958. 2002
- Molecular subtyping methods for Listeria monocytogenes. J. AOAC Int. 85:524-531. 2002
- Rational design of DNA sequencing-based subtyping methods for Listeria monocytogenes. Journal of Clinical Microbiology. 40:3319-3325. 2002
- Sigma B contributes to PrfA-mediated virulence in Listeria monocytogenes. Infect. Immun.. 70:3948-3952. 2002
- Subtyping of bacterial foodborne pathogens. Nutr. Rev. 60:201-208. 2002
- Automated ribotyping using different enzymes to improve discrimination of Listeria monocytogenes, with a particular focus on serotype 4b strains. Journal of Clinical Microbiology. 39:3002-3005. 2001
- Characterization and pathogenic potential of Listeria monocytogenes isolates from the smoked fish industry. Applied and Environmental Microbiology. 67:646-653. 2001
- Characterization of the prfA virulence gene cluster insertion site in non-hemolytic Listeria spp.: Probing the evolution of the Listeria virulence gene island. Current Microbiology. 43:271-277. 2001
- Comparative evaluation of culture- and PCR-based methods for the detection of Listeria spp. and Listeria monocytogenes from environmental and raw fish samples. Journal of Food Protection. 64. 2001
- Comparative genetic characterization of Listeria monocytogenes isolates from human and animal listeriosis cases. Microbiol. 147:1095-1104. 2001
- Correlations between molecular subtyping and serotyping of Listeria monocytogenes. Journal of Clinical Microbiology. 39:2704-2707. 2001
- Molecular Studies on the Ecology of Listeria monocytogenes in the Smoked Fish Processing Industry. Applied and Environmental Microbiology. 67:198-205. 2001
- Molecular studies on the ecology of Listeria monocytogenes in the smoked fish processing industry. Applied and Environmental Microbiology. 67:198-205. 2001
- Recurrent Listeria monocytogenes infection: Relapse or reinfection with a unique strain confirmed by molecular subtyping. Clin. Infect. Dis. 33:127-259. 2001
- Molecular and phenotypic characterization of Pseudomonas spp. isolated from milk. Applied and Environmental Microbiology. 66:2085-2095. 2000
- Phylogeny and functional conservation of {sigma}E in endospore-forming bacteria. Microbiol.. 146:1593-1603. 2000
- Characterization of rpoS alleles in Escherichia coli O157:H7 and in other E. coli serotypes. Journal of Applied Microbiology. 86:295-301. 1999
- Development of a PCR assay for detection of spore-forming bacteria. J. Rapid Meth. Auto. Microbiol. 7:251-262. 1999
- Molecular investigation of a listeriosis outbreak in goats caused by an unusual strain of Listeria monocytogenes. JAVMA. 215:369-371. 1999
- Bacterial tracking in a dairy production system using phenotypic and ribotyping methods. Journal of Food Protection. 10:1336-1340. 1998
- General stress transcription factor sigmaB and its role in acid tolerance and virulence of Listeria monocytogenes. Journal of Bacteriology. 180:3650-3656. 1998
- Strain differentiation of Clostridium perfringens by bacteriocin typing, plasmid profiling and ribotyping. Zentralbl Veterinarmed B. 45:595-602. 1998
- An outbreak investigation of listeriosis in sheep in New York state. American Journal of Veterinarian Research. 58:733-737. 1997
- Diversity of Streptococcus agalactiae and Staphylococcus aureus ribotypes recovered from New York dairy herds. American Journal of Veterinarian Research. 58:482-487. 1997
- Ribotypes and virulence gene polymorphisms suggest three distinct Listeria monocytogenes lineages with differences in their pathogenic potential. Infect. Immun. 65:2707-2716. 1997
- Plasmid profiling for strain differentiation and characterization of Clostridium perfringens isolates. Zentralbl Veterinarmed B. 43:137-146. 1996
- Ribotype diversity of Listeria monocytogenes strains associated with outbreaks of listeriosis in ruminants. Journal of Clinical Microbiology. 34:1086-1090. 1996
- Applications of DNA amplification techniques in veterinary diagnostics. Veterinary Research Communications. 19:375-407. 1995
- Detection of Escherichia coli O157:H7 by multiplex PCR. Journal of Clinical Microbiology. 33:2188-2191. 1995
- Detection of Listeria monocytogenes in surface swabs using a nonisotopic polymerase chain reaction-coupled ligase chain reaction. Food Microbiology. 12:151-157. 1995
- Use of plasmid profiling as a typing method for epidemiologically related Clostridium perfringens isolates from food poisoning cases and outbreaks. Letters in Applied Microbiology. 20:290-294. 1995
- A ligase chain reaction targeting two adjacent nucleotides allows the differentiation of cowpox virus from other Orthopoxvirus species. J. Virol. Meth. 49:353-360. 1994
- Detection of bovine leukocyte adhesion deficiency by nonisotopic ligase chain reaction. Animal Genetics. 25:95-98. 1994
- Diagnosis, epidemiology and characterization of Listeria monocytogenes strains in two outbreaks of listerial encephalitis in small ruminants. Journal of Clinical Microbiology. 32:991-996. 1994
- Identification of Erwinia stewartii by a ligase chain reaction assay. Applied and Environmental Microbiology. 60:278-284. 1994
- Ligase chain reaction (LCR) - Overview and applications. PCR Meth. Appl. (Manual Supplement). 3. 1994
- Ligase chain reaction for the differentiation of cowpox virus from other orthopoxvirus species based on the deletion of two adjacent nucleotides. Experienta. 50:795-796. 1994
- Detection of Bovine Herpesvirus-1 in bovine semen by a nested PCR assay. J. Virol. Meth. 44:129-140. 1993
- Detection of Listeria monocytogenes with a nonisotopic polymerase chain reaction-coupled ligase chain reaction assay. Applied and Environmental Microbiology. 59:2743-2745. 1993
- Differentiation of Listeria monocytogenes and Listeria innocua by 16S rDNA and intraspecies discrimination of Listeria monocytogenes strains by random amplified polymorphic DNA polymorphisms. Applied and Environmental Microbiology. 59:304-308. 1993
- Non-radioactive detection of Mycobacterium tuberculosis LCR products in a microtitre plate format. Mol. Cell. Probes. 7:179-186. 1993
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article
- Next-Generation Sequencing Methods Revolutionize Food Microbiology 2011
- International Conference Explores Human Nutrition 2010
- Research answers question on foodborne pathogen 2003
- DNA Fingerprinting to improve milk quality and safety 2002
- Food safety applications of nucleic acid-based assays: Polymerase and ligase chain reaction can help detect foodborne pathogens and track isolates to their source of infection 1994
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book
-
chapter
- Overview: The impact of microbial genomics on food safety. Genomics of Foodborne Bacterial Pathogens. 1-28. 2011
- Environmental reservoir and transmission into the mammalian host. Listeria monocytogenes Pathogenesis and Host Response. 111-137. 2007
- Hijacking the host cell: foodborne pathogen strategies for reproduction and defense evasion. Food consumption and disease risk. 293-314. 2006
- Host–pathogen interactions. Understanding pathogen behaviour. 99-114. 2005
- Molecular Evolution of Diversity of Foodborne Pathogens. Food Biotechnology. 2005
- Epidemiology of listeriosis. Microbial Food Safety in Animal Agriculture: Current Topics. 221-232. 2003
- Infectious diseases of dairy animals: Listeriosis. Encyclopedia of Dairy Science. 777-782. 2002
- The Microbial Safety of Minimally Processed Seafood with Respect to Listeria monocytogenes. Microbial Safety of Minimally Processed Foods. 53-75. 2002
- Clostridium tyrobutyricum. Encyclopedia of Food Microbiology. 451-458. 1999
- Detection of Listeria monocytogenes by PCR coupled ligase chain reaction. PCR Strategies. 347-361. 1995
- Ligase-mediated detection techniques. Methods in DNA Amplification. 83-92. 1994
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conference paper
- Pathogens in Produce Production Environments: A Longitudinal Study of Fruit and Vegetable Farms in New York State. 2011 IAFP Annual Conference Proceedings. 2011
- Isolation and Detection of Listeria monocytogenes , E. coli O157:H7, non-O157 shiga Toxin Producing E. coli and Salmonella from Produce Farms. Cornell University’s Infection and Pathobiology Annual Retreat, Owego, NY, October 2010. 2010
- Listeria monocytogenes: A challenge for the smoked seafood industry. International Smoked Seafood Conference Proceedings. 1-4. 2008
- Not just for stress response: sigma B and virulence in Listeria moncytogenes. . Society for General Microbiology. 5. 2008
- Linkages between animal infections and human listeriosis. Proceedings of the 2007 American College of Veterinary Internal Medicine (ACVIM) Forum. 2007
- Listeria monocytogenes: Transmission and disease in ruminants. Proceedings of the 2007 American College of Veterinary Internal Medicine (ACVIM) Forum. 2007
- Background correction and normalization for cDNA microarray data. Proceedings of the 2006 International Symposium on Veterinary Epidemiology and Economics (ISVEE). 2006
- Laboratory techniques to assure farm-to-table milk quality and safety. Proceedings of the III Panamerican Congress on Mastitis Control and Milk Quality. 2006
- Predictive model of Listeria monocytogenes fecal shedding in a dairy herd. Proceedings of the 2006 International Symposium on Veterinary Epidemiology and Economics (ISVEE). 2006
- Hazard characterization issues: virulence, pathogenesis, and modeling dose-response. Food Protection Trends. 39. 2005
- Molecular Evolution of Listeria monocytogenes. Food Protection Trends. 60-61. 2005
- Optimal Levels of Inputs under Risk to Control Listeria monocytogenes Contamination at a Smoked Fish Plant. 2005 American Agricultural Economic Association Meetings,. 2005
- Optimal Levels of Inputs under Risk to Control Listeria monocytogenes Contamination at a Smoked Fish Plant. SCC-76 meeting, Economics and Management of Risk in Agriculture and Natural Resources. 2005
- Listeria monocytogenes contains two species-like evolutionary lineages and subtypes with reduced invasiveness. Molecular Methods in Milk Quality Symposium Proceedings (Cornell University). 2004
- Listeria monocytogenes transmission from farm-to-table. Proceedings of Food Protection 2004 International Conference. 57-61. 2004
- MLST and antimicrobial resistance of Salmonella. Molecular Methods in Milk Quality Symposium Proceedings (Cornell University). 2004
- Molecular and phenotypic characterization of Listeria monocytogenes isolates from humans and foods to define human pathogenic strains. Food Protection Trends. 759-761. 2004
- Molecular detection and subtyping methods for foodborne pathogens. Proceedings of Food Protection 2004 International Conference. 57-61. 2004
- Multi-Locus Sequence Typing of Streptococcus uberis shows reticulate evolution between housekeeping genes and positive selection in a putative vaccine target. Molecular Methods in Milk Quality Symposium Proceedings (Cornell University). 2004
- Control of Listeria monocytogenes in sheep farming and in dairy processing. Proc. 9th Great Lakes Dairy Sheep Symposium. 4-9. 2003
- Genomics of foodborne pathogens: Research at Cornell. Proceedings, The Second Joint Colloquium on Agricultural Biotechnology: Challenges and Prospects of Agricultural Genomics. 53-56. 2002
- Relationships between virulence and Listeria monocytogenes genotypes. Proceedings from the ILSI North America Symposium Series on Food Microbiology. 9-12. 2000
- Laboratory surveillance and molecular subtyping for Listeria monocytogenes from human, animal and food sources. Food Microbiology and Food Safety into the next millenium. 111-114. 1999
- Automated ribotyping for assuring quality and safety of raw and processed milk. Proceedings of the Panamerican Congress on Mastitis Control and Raw Milk Quality. 391-394. 1998
- Molecular epidemiologic features of listeriosis in animals in New York State. Epidemiol. sante anim. 1997
- Application of DNA amplification methods in veterinary medical diagnostics. Proceedings of the 21st congress of the German Veterinary Medical Society, Bad Nauheim, Germany. 163-170. 1995
- Molecular Epidemiologic Studies on Equine Motor Neuron Disease. Proceedings of the Seventh International Conference on Equine Infectious Diseases, Tokyo, Japan. 326-327. 1995
- Detection of Listeria monocytogenes in surface swabs using PCR-coupled ligase chain reaction. Proceedings of the 34th workshop of the German Veterinary Medical Society - Studygroup for Food Hygiene (Part I - Oral Presentations), Giessen, Germany. 114-122. 1994
- Equine Motor Neuron Disease: Molecular Epidemiology. The Kenya Veterinarian (Proceedings of the 7th International Symposium on Veterinary Epidemiology and Economics). 290-292. 1994
- The utility of nucleic acid-based assays in the detection of Listeria monocytogenes and in the epidemiologic tracking of isolates. Proceedings of "Conquering Listeria" - A Food Safety Symposium. 1993
-
conference poster
- Diversification of sigma B-dependent promoters among Listeria monocytogenes strains representing lineages I, II, IIIA, and IIIB. 2009
- Diversity and Distribution of Salmonella spp. within the Farm Environment and in Subclinical Animals. 2009
- Molecular Ecology of Listeria in Small and Very Small Ready-To-Eat Meat Processing Plants. 2009
- Quantitative risk assessment on the effect of Listeria monocytogenes contamination in deli meats originating from manufacture and retail, on listeriosis cases. 2009
- Utilization of a Multiplex Single Nucleotide Polymorphism (SNP) Genotyping Assay to Determine the Prevalence of Virulence-Attenuating Mutations in inlA among Human Clinical and Food isolates. 2009
- Variation in Listeria monocytogenes dose response in relation to Internalin A subtypes 2009
-
document part
- A longitudinal study on Listeria monocytogenes contamination patterns in small and very small ready-to-eat meat processing plants 2008
- Contributions of multiple transcriptional regulators to Listeria monocytogenes virulence and virulence-associated phenotypes. 2008
- Interactions between Sigma B and Sigma L appear to contribute to Listeria monocytogenes antimicrobial resistance.. 24. 2008
- Transcriptomic and phenotypic analyses suggest differences in sigma B contributions to stress response and virulence in Listeria monocytogenes strains representing lineages I, II, IIIA, and IIIB. 2008
- National Needs Graduate Fellowships in Food Science at Cornell University 2007
- Development of a ligase chain reaction assay for identification of Erwinia stewartii. 365. 1993
-
intellectual contribution
-
manual
- Ligase chain reaction. 631-652. 1995
-
report
- Re-emergence of Listeria. 26-27. 2000
- A multistate outbreak of listeriosis – laboratory role in identification of clusters. 23-24. 1999
- Mad cow disease. 24-25. 1998
- Listeria monocytogenes detection and identification. 16-17. 1996
- Characterization of Listeria monocytogenes isolates and epidemiology of listeriosis 1997
featured in archived article
- CU food scientists keep watch over New York dairy foods
- Cornell food scientists awarded $1.67 million to improve fresh food safety
- Cornell partners with Indian university to offer innovative degree in food science
- Cornell researcher helps lead $2 million project to prevent Listeria contamination in ready-to-eat foods
- Scientists advance understanding of food pathogen
- With $1.1 million from Sea Grant, Cornell to study PCBs, lake invaders and more
Teaching
teaching overview
- My teaching philosophy is to use active learning to (i) teach students critical thinking skills and the ability to critically evaluate and judge information presented to them (in print, through the Internet, and orally); (ii) help student to develop life long-learning skills; and (iii) help students acquire the ability and self confidence to develop and defend their own ideas. In addition, I strive to provide students with relevant and current content in all classes I teach.
teaching activities
- FDSC-5000: Master of Professional Studies (Agriculture) Project - Spring 2013
- FDSC-6940: Special Topics in Food Science - Spring 2013
- FDSC-6960: Graduate Internship in Food Science - Spring 2013
- FDSC-8900: Master's Level Thesis Research - Spring 2013
- FDSC-9900: Doctoral-Level Thesis Research - Spring 2013
- FDSC-5000: Master of Professional Studies (Agriculture) Project - Fall 2012
- FDSC-6960: Graduate Internship in Food Science - Fall 2012
- FDSC-6970: Graduate Individual Study in Food Science - Fall 2012
- FDSC-6980: Graduate Teaching Experience - Fall 2012
- FDSC-8900: Master's Level Thesis Research - Fall 2012
- FDSC-9900: Doctoral-Level Thesis Research - Fall 2012
- FDSC-5000: Master of Professional Studies (Agriculture) Project - Spring 2012
- FDSC-6960: Graduate Internship in Food Science - Spring 2012
- FDSC-8900: Master's Level Thesis Research - Spring 2012
- FDSC-9900: Doctoral-Level Thesis Research - Spring 2012
- FDSC-5000: Master of Professional Studies (Agriculture) Project - Fall 2011
- FDSC-6960: Graduate Internship in Food Science - Fall 2011
- FDSC-6970: Graduate Individual Study in Food Science - Fall 2011
- FDSC-6980: Graduate Teaching Experience - Fall 2011
- FDSC-8900: Masters-Level Thesis Research - Fall 2011
- FDSC-9900: Doctoral-Level Thesis Research - Fall 2011
Service
outreach overview
- While I have no formal extension responsibilities, I have an active program focused on integration of food safety research and outreach. I have completed two integrated research and extension projects, including (i) funded by a 3-year USDA grant in 2003 (Control strategies for Listeria monocytogenes in food processing environments, $534,287 total funding) and (ii) one funded by another 3-year USDA grant in 2003 (L. monocytogenes in Food Processing Plants: Development and implementation of Science-Based Environmental Testing and Control Strategies; $500,000 total funding). While I served as the PI for these projects, most extension activities for these projects were coordinated and conducted by collaborators, including Co-PI Ken Gall, New York Sea Grant, Cornell Cooperative Extension. The activities funded through these two grants received attention from various audiences, including because they feature successful integration of research and extension activities. In addition, I am also a Co-PI for an on-going “Special Emphasis Integrated Research and Extension Project”, entitled “Understanding and controlling Listeria monocytogenes transmission through ready-to-eat meat products from processing plant to consumer”, which was funded in 2005. This project includes a total funding of $472,750 for research and extension efforts at Cornell. In addition, I am Co-PI for two integrated research and extension projects that were funded by USDA in 2008, including (i) one grant entitled “Integrating teaching, research, and outreach efforts to facilitate industry application of molecular subtyping for foodborne pathogens” and (ii) one grant entitled “Minimizing microbial food safety hazards of fresh and fresh-cut fruits and vegetables through a farm to table approach”.
service to the profession
- New York State Association for Food Protection Scientific Advisor 2010 -
- National Sanitation Foundation International Conference on Food Safety, Steering Committee Committee Member 2001 -
- International Life Sciences Institute North America, Technical Committee on Food Microbiology Scientific Advisor 2001 -
- International Association of Food Protection Member 2000 -
- Phi Tau Sigma Member 2000 -
- American Dairy Science Association Member 1998 -
- American Veterinary Medical Association Member 1997 -
- New York State Association of Food Protection Member 1997 -
- American Society for Microbiology Member 1993 -
- Institute of Food Technologists Member 1993 -
- American Association for the Advancement of Science Member 1992 -
- Bavarian Veterinary Chamber (Bayerische Tierärztekammer) Member 1992 -
- National Academies of Science of National Research Council “Committee on the Evaluation of the Food Safety Requirements of the Federal Purchase Ground Beef Program Member 2010
- National Academies of Science National Research Council ad hoc Committee for Review of the Food Safety and Inspection Service (FSIS) Risk-based approach to public health attribution Member 2008 - 2009
- German Veterinary Society Member 1993 - 2009
- National Academies of Science of National Research Council Standing Committee of the Review of the Food Safety and Defense Risk assessments Member 2008 - 2009
- Technion-Israel Institute of Technology External evaluator 2008
- International Association for Food Protection 2008 Annual Meeting Chairperson 2007 - 2008
- Institute of Food Technologists, Samuel Cate Prescott Award Jury Committee Member 2005 - 2008
- Institute of Food Technologists (IFT) Chairperson 2008
- Foreign Agricultural Service (FAS) Attendee, Meeting - 2008
- American Society for Microbiology, Division P Chairperson 2006 - 2007
- Organizing Committee, International Symposium on the Problems of Listeriosis (ISOPOL) Committee Member 2007
- American Society for Microbiology, Division P Chair-Elect 2005 - 2006
- Organizing Committee, International Conference on “Sustainable development and new technologies for agricultural production in the GAP region”, Harran University Committee Member 2006
- Institute of Food Technologists, Committee on Divisions Committee Member 2003 - 2005
- National Cattlemen’s Beef Association (NCBA), Beef Safety Scientific Advisory panel Committee Member - 2005
- Listeria monocytogenes in Food Expert Working Group, International Life Sciences Institute Committee Member 2002 - 2005
- American Dairy Science Association, International Dairy Foods Association Research Award Chairperson 2004 - 2005
- American Dairy Science Association, International Dairy Foods Association Research Award Committee Member 2003 - 2005
- American Dairy Science Association, Foundation Scholar Award Committee Committee Member 2002 - 2005
- Date marking committee, Conference for Food Protection Committee Member 2002 - 2004
- Animal Biotechnology Task Force, Council for Agricultural Science and Technology Committee Member 2001 - 2003
- Janne Lunden, Faculty of Veterinary Medicine, University of Helsinki; thesis title: “Persistent Listeria monocytogenes contamination in food processing plants” Invited external PhD thesis reviewer - 2003
- Life Sciences Panel: Addressing Food security and Global Nutrition, Trustee Council weekend, Cornell University Moderator - 2003
- AI-SPER-0203DF692AB00010986 Judge - 2000
- Brite Fonnesbach Vogel’s PhD thesis “A polyphasic approach in typing of Shewanella spp. and Listeria monocytogenes” The Royal Veterinary and Agricultural University Invited external PhD thesis reviewer - 2000
reviewer or editor for
- American Meat Institute Foundation
- American Meat Institute Foundation, Listeria research proposal and other food safety proposals
- Applied and Environmental Microbiology
- Cornell CSREES Hatch Proposal
- External reviewer for CSREES Hatch Proposals (University of Vermont; North Carolina NC A&T State University)
- FDA RFA “Research Studies on Microbiological Studies Associated with the Food Animal Production Environment
- Genomics of Foodborne Pathogens
- Grayson-Jockey Club Research Foundation, Inc
- Integrated Research, Education, and Extension Competitive Grants Program – National Food Safety Initiative, CSREES/USDA
- Research Project Plan, USDA Agricultural Research Service, Office of Scientific Quality Review
- Sea Grant National Strategic Initiative in Technology
- State Faculty Support Grant, Cal Poly, San Luis Obispo
- State Faculty Support Grant, Cal Poly, San Luis Obispo
- State Faculty Support Grant, Cal Poly, San Luis Obispo
- Swiss Technical University (ETH) Zurich Research Commission, Competence Center Environment and Sustainability (CCES) grant
- USDA National Research Initiative Competitive Grants Program (Ensuring Food Safety Program)
- USDA National Research Initiative Competitive Grants Program (Ensuring Food Safety Program)
- USDA National Research Initiative Competitive Grants Program (Ensuring Food Safety Program)
- USDA National Research Initiative Competitive Grants Program (Epidemiological Approaches to Food Safety)
- USDA National Research Initiative Competitive Grants Program (Epidemiological Approaches to Food Safety)
- USDA National Research Initiative: Improving Food Quality and Value
- USDA SBIR
- USDA SBIR
Background
education and training
- Ph.D. in Food Science and Technology, Cornell University 1997
- University of Munich 1994
- University of Munich 1992
awards and honors
- Scientific Achievement Award, 2011
- William C. Frazier Award Lecture, 2011
- G. Malcolm Trout Visiting Scholar, 2010
- NACTA (North American Colleges and Teachers of Agriculture) award in teaching, 2010
- 2010 Grocery Manufacturers of America (GMA) Food Safety Award (team award to the Cornell Institute of Food Science [CIFS] food safety team), 2010
- Divisional Lecturer, Division P (Food Microbiology), Annual Meeting, 2009
- 2004 Mid-Atlantic Sea Grant Extension Award for Outstanding Program, 2004
- Teaching Excellence Award, Cornell Institute of Food Science, 2004
- Distinguished Speaker, Seminar in Food Science, University of Maryland, 2004
- International Life Science Institute (ILSI) North America Future Leaders Award, 2004
- Inclusion in AcademicKeys Who's Who in Sciences Higher Education (WWSHE), 2004
- Samuel Cate Prescott Award, 2003
- William V. Hickey Award (for outstanding service in the field of food sanitation), 2002
- American Dairy Science Association (ADSA), Foundation Scholar Award in Dairy Foods, 2002
- USDA Award for Superior Service, Listeria Outbreak Working Group (Group Leader), 2000
Other
college
- CALS
research keyword
- food safety
- foodborne diseases
- genomics
- listeria monocytogenes
- microbial ecology
- microbial evolution
- microbial pathogenesis
- molecular epidemiology
- salmonella
- zoonotic diseases
name prefix
- Dr.