<<snip>>
Meats purchased in grocery stores, particularly turkey products, are
frequently contaminated with antimicrobial-resistant E. coli and ExPEC.
<<snip>>
Foodborne Pathogens and Disease
Contamination of Retail Foods, Particularly Turkey, from Community
Markets (Minnesota, 1999?2000) with Antimicrobial-Resistant and
Extraintestinal Pathogenic Escherichia coli
Mar 2005, Vol. 2, No. 1: 38-49
James R. Johnson, M.D.
Mucosal and Vaccine Research Center, Minneapolis VA Medical Center,
Minneapolis, Minnesota.
Department of Medicine, University of Minnesota, Minneapolis,
Minnesota.
Parissa Delavari
Mucosal and Vaccine Research Center, Minneapolis VA Medical Center,
Minneapolis, Minnesota.
Department of Medicine, University of Minnesota, Minneapolis,
Minnesota.
Timothy T. O'Bryan
Mucosal and Vaccine Research Center, Minneapolis VA Medical Center,
Minneapolis, Minnesota.
Department of Medicine, University of Minnesota, Minneapolis,
Minnesota.
Kirk E. Smith
Minnesota Department of Health, Minneapolis, Minnesota.
Sita Tatini
Department of Food Science and Nutrition, College of Agricultural,
Food, and Environmental Sciences, University of Minnesota, Saint Paul,
Minnesota.
To assess the food supply as a possible vehicle for
antimicrobial-resistant and extraintestinal pathogenic Escherichia coli
(ExPEC), we defined the prevalence, density, clonal diversity,
virulence characteristics, and antimicrobial resistance profiles of E.
coli among diverse retail food items. A microbiological survey was
undertaken of 346 food items (vegetables, produce, beef, pork, chicken,
and turkey) purchased as a convenience sample from 16 retail markets
within the Minneapolis?St. Paul area in 1999?2000, with selective
cultures for E. coli and extensive molecular and phenotypic
characterization of E. coli isolates. Meats, particularly turkey
products, were often extensively contaminated with
antimicrobial-resistant E. coli and ExPEC, to a much greater extent
than were produce items, even those from farmer's markets. Moreover,
meat-source E. coli differed substantially from produce-source E. coli
with respect to phylogenetic background (more commonly from
virulence-associated phylogenetic groups B2 or D), virulence genotype
(more extensive), and antimicrobial resistance profile (more
extensive). Molecular typing methods matched four turkey-source
isolates to selected human clinical and fecal isolates representing the
O7:K1:H-, O83:K1, and O73/O77:K52:H18 ("clonal group A"😉 clonal groups
of ExPEC. Meats purchased in grocery stores, particularly turkey
products, are frequently contaminated with antimicrobial-resistant E.
coli and ExPEC. Further study is needed regarding the origins and
health consequences of these foodborne organisms, both to clarify the
need for and to guide the possible development of appropriate
regulatory and monitoring systems and preventive interventions.
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