Study of antibiotic sensitivity of Esherichia coli isolated from Broiler Chickens

Antibiotic sensitivity testing of E.coli isolates, showed that most isolates were sensitive 100% to colistin sulphate and kanamycin/cephlaxine in the first degree, also gave different results to other antibiotics. On the other hand, the isolates showed complete resistance 100% for Ampicillin, Gentamycin, Pencillin G, Tetracycline and Tylosin, in addition to appearance of 11 multiple resistance pattern. The results of determination of minimal inhibitory concentration (MIC) for E.coli showed the presence of variable minimal inhibitory concentration in relation to the serotypes of E.coli when used different antibiotics.