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• W2136351951 endingPage "2112" @default.
• W2136351951 startingPage "2103" @default.
• W2136351951 abstract "Escherichia coli O157:H7 is a Shiga toxin (stx)-producing E. coli (STEC) strain that has been classified as an adulterant in U.S. beef. However, numerous other non-O157 STEC strains are associated with diseases of various severities and have become an increasing concern to the beef industry, regulatory officials, and the public. This study reports on the prevalence and characterization of non-O157 STEC in commercial ground beef samples (n = 4,133) obtained from numerous manufacturers across the United States over a period of 24 months. All samples were screened by DNA amplification for the presence of Shiga toxin genes, which were present in 1,006 (24.3%) of the samples. Then, culture isolation of an STEC isolate from all samples that contained stx(1) and/or stx(2) was attempted. Of the 1,006 positive ground beef samples screened for stx, 300 (7.3% of the total of 4,133) were confirmed to have at least one strain of STEC present by culture isolation. In total, 338 unique STEC isolates were recovered from the 300 samples that yielded an STEC isolate. All unique STEC isolates were serotyped and were characterized for the presence of known virulence factors. These included Shiga toxin subtypes, intimin subtypes, and accessory virulence factors related to adherence (saa, iha, lifA), toxicity (cnf, subA, astA), iron acquisition (chuA), and the presence of the large 60-MDa virulence plasmid (espP, etpD, toxB, katP, toxB). The isolates were also characterized by use of a pathogenicity molecular risk assessment (MRA; based on the presence of various O-island nle genes). Results of this characterization identified 10 STEC isolates (0.24% of the 4,133 total) that may be considered a significant food safety threat, defined by the presence of eae, subA, and nle genes." @default.
• W2136351951 created "2016-06-24" @default.
• W2136351951 creator A5016841848 @default.
• W2136351951 creator A5032517760 @default.
• W2136351951 date "2011-03-15" @default.
• W2136351951 modified "2023-10-16" @default.
• W2136351951 title "Prevalence and Characterization of Non-O157 Shiga Toxin-Producing <i>Escherichia coli</i> Isolates from Commercial Ground Beef in the United States" @default.
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• W2136351951 doi "https://doi.org/10.1128/aem.02833-10" @default.
• W2136351951 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/3067332" @default.
• W2136351951 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/21257806" @default.
• W2136351951 hasPublicationYear "2011" @default.
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