Occurrence of shigatoxinogenic Escherichia coli O157 in Norwegian cattle herds

被引：45
|
作者：
Vold, L [1 ]
Johansen, BK [1 ]
Kruse, H [1 ]
Skjerve, E [1 ]
Wasteson, Y [1 ]
机构：
[1] Norwegian Coll Vet Med, Dept Pharmacol Microbiol & Food Hyg, N-0033 Oslo, Norway
来源：
EPIDEMIOLOGY AND INFECTION | 1998年 / 120卷 / 01期
关键词：
D O I：
10.1017/S0950268897008364
中图分类号：
R1 [预防医学、卫生学];
学科分类号：
1004 ; 120402 ;
摘要：
To investigate if there is a reservoir of Escherichia coli O157 in Norwegian cattle, faecal samples from 197 cattle herds were screened for E. coli O157 by the use of immunomagnetic separation (IMS) and PCR during the 1995 grazing season. Six E. coli O157:H-isolates were detected in two herds, one isolate in one and five in the other. The isolates carried the stx(1), stx(2), and eae genes, and a 90 MDa virulence plasmid. They were toxinogenic in a Vero cell assay. From 57 other herds, 137 faecal samples were positive for stx(1) and/or stx(2) genes detected by PCR run directly on IMS-isolated material. Among these samples, stx(2) were the most widely distributed toxin encoding genes. No difference was found among milking cows and heifers in the rate of stx(1) and/or stx(2) in positive samples.
引用
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页码：21 / 28
页数：8
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