Isolation of Verocytotoxin-Producing <I>Escherichia coli</I> from Carcasses of Cattle at Slaughter Houses

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  • と畜場の牛枝肉からのベロ毒素産生性大腸菌分離
  • トチクジョウ ノ ウシ エダニク カラ ノ ベロ ドクソ サンセイセイ ダイチ
  • Isolation of Verocytotoxin-Producing Escherichia coli from Carcasses of Cattle at Slaughter Houses

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Abstract

Of 4, 810 bovine carcasses examined at slaughter houses, 9 (0.2%) were positive for verocytotoxin-producing Escherichia coli (VTEC). The isolates were of serotypes O26: H11 (1 strain), O111: H8 (4 strains), O128: H2 (1strain) and O157: H7 (3 strains). A total of 21 VTEC isolates, 9 fecal and 12 carcass strains, were examined for eaeA and bfp genes and 60MDa plasmid, revealing eaeA gene and 60MDa plasmid in 8 strais with O157: H7 and 4 strains each with O26: H11 and O111: H8. One strain each with O26: H11 and O128: H2 had only eaeA and 60MDa plasmid, respectively. No bfp gene was detectable, and VTEC with O6: H+, OUT: H+ or OUT: H- had no pathogenic factors.

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