Noval E.coli serotypes isolated from acute upper respiratory tract infection of poultry

M.B. Mahrukh, T.S. Rai and S.K. Jand
Department of Veterinary Microbiology College of Veterinary Science
Punjab Agricultural University, Ludhiana - 141 004

Any respiratory infections in poultry can create havoc for a poultry farmer with the severe decrease in egg production and reduced weight gain of the flocks. Bacteria can be the primary or secondary pathogens in poultry respiratory infections. Fifty-five samples in the form of nasal swabs, infraorbital swabs, lung and trachea were collected from birds showing signs of acute upper respiratory tract infection like infraorbital swelling, nasal and ocular discharge, respiratory distress and the flocks had history of reduced production. Among the different bacteria isolated E coli was the most predominant and accounted for fifteen of the total of fifty bacterial isolates. The serotyping of the isolates revealed the presence of three serotypes of O3 and O5 each and one each of O7, O9, O13, O25, O32, O84, O87, O89 and O155. The presences of these serotypes except O9 have not been reported in poultry respiratory tract infection so far. None of the isolates serotyped except O3 have been reported to cause any disease in any other species. The anitbiogram of E.coli isolates showed very high levels of antibiotic resistance.

Source : IPSACON-2005

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