Characterization of Shiga Toxigenic Escherichia coli O157 and Non-O157 Isolates from Ruminant Feces in Malaysia

Perera, A. and Clarke, C. and Dykes, G. and Fegan, N. 2015. Characterization of Shiga Toxigenic Escherichia coli O157 and Non-O157 Isolates from Ruminant Feces in Malaysia. BioMed Research International. 2015: Article ID 382403.

Source Title

BioMed Research International

DOI

10.1155/2015/382403

ISSN

2314-6133

School

School of Public Health

Remarks

This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by/3.0/

URI

http://hdl.handle.net/20.500.11937/20917

Collection

Curtin Research Publications

Abstract

Shiga toxigenic Escherichia coli (STEC) O157 and several other serogroups of non-O157 STEC are causative agents of severe disease in humans world-wide. The present study was conducted to characterize STEC O157 and non-O157 serogroups O26, O103, O111, O121, O45, and O145 in ruminants in Malaysia. A total of 136 ruminant feces samples were collected from 6 different farms in Peninsular Malaysia. Immunomagnetic beads were used to isolate E. coli O157 and non-O157 serogroups, while PCR was used for the detection and subtyping of STEC isolates. STEC O157:H7 was isolated from 6 (4%) feces samples and all isolates obtained carried stx2c, eaeA-γ1, and ehxA. Non-O157 STEC was isolated from 2 (1.5%) feces samples with one isolate carrying stx1a, stx2a, stx2c, and ehxA and the other carrying stx1a alone. The presence of STEC O157 and non-O157 in a small percentage of ruminants in this study together with their virulence characteristics suggests that they may have limited impact on public health.