Affiliation: Cornell University
- Malley T, Butts J, Wiedmann M. Seek and destroy process: Listeria monocytogenes process controls in the ready-to-eat meat and poultry industry. J Food Prot. 2015;78:436-45 pubmed publisher..Thus, a regulatory environment that encourages aggressive environmental Listeria testing is required to facilitate continued use of this science-based strategy for controlling L. monocytogenes in RTE foods. ..
- TrmÄiÄ‡ A, Martin N, Boor K, Wiedmann M. A standard bacterial isolate set for research on contemporary dairy spoilage. J Dairy Sci. 2015;98:5806-17 pubmed publisher..This isolate set along with publicly available isolate data provide a unique resource that will help advance knowledge of dairy-spoilage organisms as well as aid industry in development and validation of new control strategies. ..
- Miller R, Kent D, Watterson M, Boor K, Martin N, Wiedmann M. Spore populations among bulk tank raw milk and dairy powders are significantly different. J Dairy Sci. 2015;98:8492-504 pubmed publisher..These data provide important insight regarding the diversity of spore populations isolated from dairy powders and bulk tank raw milk, and demonstrate that several spore genera are detected by multiple spore count methods. ..
- Orsi R, Wiedmann M. Characteristics and distribution of Listeria spp., including Listeria species newly described since 2009. Appl Microbiol Biotechnol. 2016;100:5273-87 pubmed publisher..monocytogenes. This review will provide a comprehensive critical summary of our current understanding of the characteristics and distribution of the new Listeria species with a focus on Listeria sensu lato. ..
- Hervert C, Alles A, Martin N, Boor K, Wiedmann M. Evaluation of different methods to detect microbial hygiene indicators relevant in the dairy industry. J Dairy Sci. 2016;99:7033-7042 pubmed publisher..The data obtained from this study identify differences in detection between 5 microbial hygiene indicator tests and highlight the benefits of EB and total gram-negative testing methods. ..
- Miller R, Wiedmann M. The Cytolethal Distending Toxin Produced by Nontyphoidal Salmonella Serotypes Javiana, Montevideo, Oranienburg, and Mississippi Induces DNA Damage in a Manner Similar to That of Serotype Typhi. MBio. 2016;7: pubmed publisher..Our data suggest that infection with Salmonella strains that encode S-CDT has the potential to result in DNA damage, which may contribute to long-term sequelae. ..
- den Bakker H, Cummings C, Ferreira V, Vatta P, Orsi R, Degoricija L, et al. Comparative genomics of the bacterial genus Listeria: Genome evolution is characterized by limited gene acquisition and limited gene loss. BMC Genomics. 2010;11:688 pubmed publisher..This information will allow for the development of genetic and genomic criteria for pathogenic strains, including development of assays that specifically detect pathogenic Listeria strains. ..
- Orsi R, Borowsky M, Lauer P, Young S, Nusbaum C, Galagan J, et al. Short-term genome evolution of Listeria monocytogenes in a non-controlled environment. BMC Genomics. 2008;9:539 pubmed publisher..Short-term evolution of L. monocytogenes in non-controlled environments appears to involve limited diversification beyond plasmid gain or loss and prophage diversification, highlighting the importance of phages in bacterial evolution. ..
- Orsi R, Sun Q, Wiedmann M. Genome-wide analyses reveal lineage specific contributions of positive selection and recombination to the evolution of Listeria monocytogenes. BMC Evol Biol. 2008;8:233 pubmed publisher..Diversification of cell wall and membrane biogenesis and motility-related genes may play a particularly important role in the evolution of L. monocytogenes. ..
- Weller D, Kovač J, Kent D, Roof S, Tokman J, Mudrak E, et al. Escherichia coli transfer from simulated wildlife feces to lettuce during foliar irrigation: A field study in the Northeastern United States. Food Microbiol. 2017;68:24-33 pubmed publisher..These findings provide key data that may be used in future quantitative risk assessments to identify potential intervention strategies for reducing food safety risks associated with fresh produce. ..
- Wiedmann M, Bruce J, Keating C, Johnson A, McDonough P, Batt C. Ribotypes and virulence gene polymorphisms suggest three distinct Listeria monocytogenes lineages with differences in pathogenic potential. Infect Immun. 1997;65:2707-16 pubmed..monocytogenes subspecies. None of the 20 human isolates available but 11% of our animal isolates were grouped in this lineage, indicating that strains in this lineage might have reduced virulence for humans...
- Trmčić A, Ralyea R, Meunier Goddik L, Donnelly C, Glass K, D AMICO D, et al. Consensus categorization of cheese based on water activity and pH-A rational approach to systemizing cheese diversity. J Dairy Sci. 2017;100:841-847 pubmed publisher..g., risk to human health equivalent to pasteurized milk cheeses). ..
- Evanowski R, Reichler S, Kent D, Martin N, Boor K, Wiedmann M. Short communication: Pseudomonas azotoformans causes gray discoloration in HTST fluid milk. J Dairy Sci. 2017;100:7906-7909 pubmed publisher..g., addition of ink) or other inadvertent chemical contamination. ..
- Nightingale K, Windham K, Martin K, Yeung M, Wiedmann M. 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 epitheli. Appl Environ Microbiol. 2005;71:8764-72 pubmed publisher..monocytogenes subtypes which are common among U.S. food isolates but rare among human listeriosis isolates carry inlA mutations that are associated with, and possibly at least partially responsible for, an attenuated invasion phenotype...