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A long-term study on the prevalence of shiga toxin-producing Escherichia coli (STEC) on four German cattle farms

  • L. GEUE (a1), M. SEGURA-ALVAREZ (a1), F. J. CONRATHS (a1), T. KUCZIUS (a2), J. BOCKEMÜHL (a2), H. KARCH (a3) and P. GALLIEN (a4)...

Abstract

The occurrence of Shiga toxin-producing Escherichia coli (STEC) was studied on four cattle farms. STEC were detected in 29–82% of the cattle. STEC with additional EHEC markers were detected on all farms. The occurrence of the complete virulence marker pattern (stx1 and/or stx2, eae, EHEChlyA, katP, espP) was correlated with the presence of known STEC serotypes. STEC O26[ratio ]H11 and O165[ratio ]H25 with the complete pattern of virulence markers were the most prevalent. STEC O157 (H7/H-) STEC O103[ratio ]H2 and STEC O145[ratio ]H- were found sporadically. Five clonal subgroups of the STEC O26[ratio ]H11 isolates were identified by pulsed-field gel electrophoresis. STEC O26[ratio ]H11 were present in three groups of cattle. This serotype was detected in a single group over the entire fattening period. Most STEC O26[ratio ]H11 with the complete pattern of potential virulence markers were found in clinically healthy cattle. These animals may represent a risk factor for farmers and consumers.

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A long-term study on the prevalence of shiga toxin-producing Escherichia coli (STEC) on four German cattle farms

  • L. GEUE (a1), M. SEGURA-ALVAREZ (a1), F. J. CONRATHS (a1), T. KUCZIUS (a2), J. BOCKEMÜHL (a2), H. KARCH (a3) and P. GALLIEN (a4)...

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