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Anti-Microbial Resistance Profile of Escherichia Coli Isolates From Commercial Poultry Feeds and Feed Raw Materials

By Animal Research International, University Of Nigeria, Nsukka.

Summary

ABSTRACT:
Information on the level to which commercial feeds and feed raw materials are involved in the dissemination o anti-microbial resistant pathogenic and commensal bacteria in Nigeria is necessary for feed and stock management. Forty four Escherichia coli isolates from 4 commercial feed brands coded SF, GF, TF and ACF and from 90 various feed raw materials such, f sh meal (FM), maize (MA), maize offal (MO), wheat offal (WO), spent grain (SG), blood meal (BM) and soybean meal (SM) etc were screened for anti-microbial resistance profile against 10 antibiotics using the d sc d fusion method. Overall, the isolates recorded 80.8 % resistance to cefuroxime, 76.9 % to nalidixic acid, 75 % to ampicillin, and 59 6 % to cotrimoxazole while very low 7 7 % was recorded for tetracycline and 5 8 % for gentamycin, ciprofloxacin and chloramphenicol. Across commercial feed brands, isolates from SF were resistant to nitrofurantoin (100 %), nalidixic acid (50 %) and ampicillin (70 %), while those from TF, GF and ACF were resistant to 7 6 and 5 antibiotics respectively. Resistance against ampicillin, nalidixic acid and cefuroxime, in isolates from SG, palm kernel cake (PK), MO and WO were high.
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