Colibacillosis is one of the most common bacterial diseases in animals and poultry and some serotypes transmitted from animals to human. In this study, 156 isolated E. coli were identificated by prepared antisera and 4 other polyvalent and 16 other monovalent antisera. The serotypes were 078K80 (37.18%), 0l28K67 (14.74%), 02K1 (13.46%), 0124K72 (5.13%), 0119B14 (2.56%), 0l11K58 (B4)(2.56%), Oil 4K90(2.56%), 02K 12(0.64%), 01 26K7 1 (0.64%), 0125K7 (0.64%), 086K8l (0.64%). There were 9 rough (5.77%) and 21 untypable (13.5%) Strains.
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