Escherichia coli associated with swollen head syndrome in broiler chickens [electronic resource].

Includes references.

A total of 150 samples were taken from five broiler chicken flocks showing swollen head syndrome between 2nd and 6th weeks of age in Dakhlia governorate, where the samples were taken frm apparently healthy as well as clinically diseased chickens. Bacteriological examination of the total number of collected samples revealed the isolation of E. coli with percentage of 78.7% where the isolation from apparently healthy and clinically diseased with percentage of 72.0% and 85.3% respectively. Serological identification of the isolates revealed that the serotype O2 (35.6%), 078 (30.5%), 05 (20.3%) and untyped strains (13.6%). By using antimicrobial agents, E. coli isolates were more sensitive to enrofloxacin, gentamycin, erythromycin, cefotaxin and streptomycin. Key words: Escherichia coli, swollen head syndrome, broiler chickens.

Summary in Arabic.