Isolation, characterization, pathogenicity and antibiotic resistance of Escherichia Coli from poultry farms

摘要

Of500 samples screened, 225 (45%) E. coli isolates from poultry farms of Andhra Pradesh were serotyped as 02, 05, Og, O20, 028, O^, 069, Og2, OI00, OUI, 0123, Oi28, 0138, 0143 and 0156. The hemagglutination (HA) study using erythrocytes of guinea pig,mice, rabbit, cattle, goat, sheep and chicken showed five HA patterns. Mannose sensitive strains of six serotypes caused airsacculitis, pericarditis, perihepatitis and peritonitis in pathogenicity assays. The pathogenic nature was studied by Congo red binding test. Chloramphenicol was most effective drug on E. coli isolates tested, followed by streptomycin, gentamycin and kanamycin.