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International Journal of Poultry Science

.: Home > International Journal of Poultry Science > 2009 > Volume 8 Number 1 > A.A. Saleha1, Tin Tin Myaing2, K.K. Ganapathy3, I. Zulkifli4, R. Raha5 and K. Arifah1

Possible Effect of Antibiotic-Supplemented Feed and Environment on the Occurrence of Multiple Antibiotic Resistant Escherichia coli in Chickens

A.A. Saleha1, Tin Tin Myaing2, K.K. Ganapathy3, I. Zulkifli4, R. Raha5 and K. Arifah1
1Department of Veterinary Pathology and Microbiology, Faculty of Veterinary Medicine, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia 2Department of Pharmacology and Parasitology, University of Veterinary Medicine, Yezin, Myanmar 3Department of Veterinary Pathology, University of Liverpool, Leahurst, Cheshire, United Kingdom 4Department of Biotechnology, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
Abstract :

The purpose of this study was to determine the occurrence of antibiotic resistant Escherichia coli
isolated from chicks and chickens. This study was carried out on three flocks of birds fed commercial feeds supplemented with antibiotics from three commercial farms. The chicks and chickens in the fourth flock were reared in a chicken house, given feed without antibiotic supplementation. Cloacal swabs were taken from 50 birds per flock at 1, 21 and 42-day old. A total of 507 E. coli were isolated from these birds. The resistance of E. coli isolated form 1-day-old chicks to chloramphenicol (10 ىg), cephalothin (30 ىg), cephalaxin (30 ىg), enrofloxacin (5 ىg) and neomycin (30 ىg) was 0-45% compared to the other four antibiotics, nalidixic acid (30 ىg), streptomycin (10 ىg), tetracycline (30 ىg) and trimethoprim (5 ىg) which was 75-100%. The rates of resistance to antibiotics increased with the age of the chicks. Most of the isolates were resistant to at least 6 to 7 antibiotics. The highest rates of resistance to antibiotics were seen in 21 and 42 day old chickens. Escherichia coli, Klebsiella and Pseudomonas sp. isolated from feed samples were resistant to 4-9 antibiotics. The study suggests that the colonization antibiotic-resistant E. coli in the intestinal tracts of chicks and chickens were not necessarily due to the use of antibiotics in the feed as supplementation but may also be acquired from the immediate “contaminated” environment.

Keywords :
Escherichia coli, antibiotic resistance, chickens

Date Deposited : 05 Jul 2011 10:16

Last Modified : 05 Jul 2011 10:16

Official URL: http://www.pjbs.org/ijps/ijps.htm

Volume 8, Number 1, - 2009 , ISSN 1682-8356

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