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Article, Chapter, or Book Title:  Identification and antimicrobial resistance of extraintestinal pathogenic Escherichia coli from retail meats
Author(s):  Xia X, Meng J, Zhao S, Bodeis-Jones S, Gaines SA, Ayers SL, McDermott PF
Year:  2011
Month:  Jan
Journal Abbrev, Book Title, or Conference:  J Food Prot
Journal Full Name:  Journal of Food Protection
Issue:  1
Volume:  74
Start Page:  38
End Page:  44
Key Words:  ExPEC, Escherichia coli, infection, retail meats, isolates, extraintestinal
Abstract:  Extraintestinal pathogenic Escherichia coli (ExPEC) causes a variety of infections outside the gastrointestinal tract. Retail meats are often contaminated with E. coli strains, and the meat might serve as a vehicle for spreading ExPEC. A total of 1,275 E. coli isolates from ground beef, ground turkey, chicken breasts, and pork chops obtained in Georgia, Maryland, Oregon, and Tennessee in 2006, were investigated for the presence of ExPEC by using multiplex polymerase chain reaction (PCR). ExPEC isolates were assigned to serogroups and phylogenetic groups and then analyzed for antimicrobial susceptibility. About 16% (200 of 1,275) of the E. coli isolates were ExPEC. The number of ExPEC isolates was highest in ground turkey (23.5%) and chicken breasts (20.2%), and lowest in pork chops (8.3%) and ground beef (3.4%). Most (66.5%) ExPEC isolates fell into the same phylogenetic groups (B2 and D) as did virulent human ExPEC strains. Researchers tested 15 antimicrobial drugs. Resistance to tetracycline (67.0%), sulfisoxazole (59.5%), and streptomycin (46.0%) was most frequent. Most ExPEC isolates (n = 163 [81.5%]) were resistant to at least one drug and more than half (n = 114 [57%]) were resistance to at least three drugs. This study found that ExPEC strains were frequently isolated from retail meats, especially chicken and turkey products. Scientists need to better understand the roles of certain meat types as potential sources of human ExPEC infection.