Original scientific paper

The prevalence and drug resistance profile of Shiga-toxin producing (STEC), enteropathogenic (EPEC) and enterotoxigenic (ETEC) Escherichia coli in free ranging diarrheic and non-diarrheic yaks of West Kameng, Arunachal Pradesh, India.

Samiran Bandyopadhyay orcid.org/0000-0002-9529-5715 ; Indian Veterinary Research Institute, Eastern Regional Station, Kolkata, India; National Research Centre on Yak, Dirang, West Kameng, Arunachal Pradesh, India
Achintya Mahanti ; West Bengal University of Animal and Fishery Sciences, Sarani, Kolkata, India
Chandan Lodh ; West Bengal University of Animal and Fishery Sciences, Sarani, Kolkata, India
Indranil Samanta orcid.org/0000-0003-1189-3994 ; West Bengal University of Animal and Fishery Sciences, Sarani, Kolkata, India
Tapas K. Biswas ; National Research Centre on Yak, Dirang, West Kameng, Arunachal Pradesh, India
Tapan K. Dutta ; College of Veterinary Science, Central Agricultural University, Aizwal, India
Kishore K. Baruah ; National Research Centre on Yak, Dirang, West Kameng, Arunachal Pradesh, India
Debasish Bhattacharya ; National Research Centre on Yak, Dirang, West Kameng, Arunachal Pradesh, India

Abstract

Food producing animals are the major reservoirs of Shiga-toxin producing (STEC) and enteropathogenic Escherichia coli (EPEC). The yak (Poephagus grunniens) is a unique multipurpose bovid, reared by highlanders in the Himalayan region. A total of 67 STEC, 5 EPEC and 22 ETEC strains were isolated from 256 rectal swabs of free ranging yaks from the West Kameng district of Arunachal Pradesh, India. Among the STEC isolates, shiga toxin producing genes stx2 was predominant, followed by stx1. Of all the stx variants, stx1c, stx2d, stx2c, stx2e and stx2f were detected in 23, 11, 2 and 1 isolates, respectively. Further, genes such as eaeA, ehxA, saa, iha and toxB were detected in 16, 35, 28, 10 and 2 isolates, respectively. One of the EPEC isolates possessed a bfpA gene and was categorized as typical EPEC. Among the ETEC isolates, genes such as LT, STa, STb, F41 and K99 were detected in 14, 5, 13, 2 and 2 isolates, respectively. The majority of the STEC, EPEC and ETEC isolates exhibited multi-drug resistance. The study revealed the presence of multi-drug resistant diarrhoea genic E. coli in free ranging yaks from the West Kameng district of Arunachal Pradesh. Moreover, the presence of STEC/EPEC can be a potential public health risk for tribal highlanders residing in close proximity of the reservoir yaks.

Keywords

enteropathogenic E. coli; enterotoxigenic E. coli; Shiga-toxin producing E. coli; yak; India

Hrčak ID:

147801

URI

https://hrcak.srce.hr/147801

Publication date:

20.10.2015.

Article data in other languages: croatian

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