ISOLATION, CHARACTERIZATION AND ANTIBIOGRAM OF PATHOGENIC ESCHERICHIA COLI RECOVERED FROM BROILER CHICKEN, RIYADH, SAUDI ARABIA - A. A. Al-Arfaj; A. M. Hessain; H. A. Hemeg; Kh. F. Mohamed; I. M. Moussa (Journal of Animal and Plant Sciences, 2015)
Present study was conducted on 200 fecal samples of broilers chickens suffering from colisepticemia from poultry farms in Riyadh, Saudi Arabia. Escherichia coli strains were isolated from 88 (44%) samples. Out of E. coli strains, 79 (89.77%)belonged to O126: K71, O158: K-, O114: K90, O111: K58, O78: K80 and O119: K69. Whereas, O126: K71, O158: K- and O114: K90 were the most prevalent. The antibiotic sensitivity pattern showed that all isolates were totally resistant to ampicillin. chloramphenicol and streptomycin (100%). Resistance against erythromycin and naldixic acid reached 81.01 % and was recorded in 20 strains O126: K71, 17 strains O158: K-, 15 strains O114: K90, 12 strains O111: K58, and decrease to 78.48% against ciprofloxacin in O126: K71, O114: K90, O111: K58, O78: K80 and O119: K69 strains. It should note that the recovered isolates were 84.81% intermediate to cephalexin and 53.16% sensitive gentamycin. This study highlights the high resistance of E. coli to antibiotics constitutes a threat to poultry industry in Saudi Arabia and the need for continuous surveillance of antibiotic sensitivity pattern of E. coli with a view to selecting appropriate therapy.
Keywords: journal article; Antibiogram; avian pathogenic Escherichia coli; serotypes