The 13 Shiga-toxigenic Escherichia coli (STEC) strains isolated from wholesale spinach and lettuce consisted mostly of serotypes that have not been implicated in illness. Among these strains, however, were two O113:H21 that carried virulence genes common to this pathogenic serotype (stx(2), ehxA, saa, and subAB), suggesting that their presence in ready-to-eat produce may be of health concern.
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|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3019700 | PMC |
| http://dx.doi.org/10.1128/AEM.01872-10 | DOI Listing |
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