Submitted: 16 Oct 2013
Revised: 18 Dec 2013
Accepted: 25 Dec 2013
First published online: 05 Oct 2016
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Int J Enteric Pathog. 2014;2(1): e15451.
doi: 10.17795/ijep15451
  Abstract View: 2787
  PDF Download: 1796

Research Article

Occurrence and Antimicrobial Resistance of Salmonella spp. and Escherichia coli Isolates in Apparently Healthy Slaughtered Cattle, Sheep and Goats in East Azarbaijan Province

Payman Zare 1, Hassan Ghorbani-Choboghlo 1 * , Samin Jaberi 1, Saied Razzaghi 1, Maryam Mirzae 2, Kazem Mafuni 1

1 Department of Pathobiology, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, I.R. Iran
2 Department of Food Hygiene, Faculty of Veterinary Medicine, University of Shahrekord, Shahrekord, I.R. Iran
*Corresponding author: Hassan Ghorbani-Choboghlo, Department of Pathobiology, Faculty of Veterinary Medicine, University of Tabriz, Tabriz, I.R. Iran. Tel: +98-9141780449, Fax: +98-2166933222, Email:


Background: The increasing prevalence of antimicrobial resistance bacteria in meat-producing animals, especially ruminants, represents a major problem for human and veterinary medicine and also could increase the patients' morbidity and mortality.

Objectives: The current study aimed to identify the occurrence and antimicrobial susceptibility pattern of Salmonella spp. and Escherichia coli isolated from slaughtered ruminants in East-Azarbaijan province.

Materials and Methods: In this study 160 samples (40 sheep, 40 goats and 80 cattle) were examined to isolate the enteric pathogens. The antibiotic resistance was determined by Kirby-Bauer disc diffusion method using 12 antibiotics.

Results: A total of one hundred and twenty bacteria were obtained and most of these isolates belonged to these following genera: Escherichia coli (25%), Proteus (18.8%), Salmonella spp. (8.8 %), Pseudomonas spp. (7.5%) and Yersinia spp. (6.3%). Eight (57.1%) of 14 Salmonella spp. isolates and 26 (65%) of 40 E. coli isolates showed resistance to more than four antibiotics, called multiple antibiotic resistance (MAR).

Conclusions: Overall, the obtained results emphasize the need for a surveillance and monitoring system to emerge drug resistance in all pathogenic microorganisms in ruminant and other animals.

Implication for health policy/practice/research/medical education:

The first critical component of comprehensive farms, to reduce the burden of food-borne diseases, is to identify the pathogenic bacteria especially enteric pathogen contamination in food products. To the authors best knowledge these data have novelty in Iran and east Azerbaijan province.

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