Prevalence of diseases in commercial chickens at sylhet division of Bangladesh

The study was undertaken to determine the prevalence diseases in commercial chickens in Sylhet region of Bangladesh. Among the diseases prevalence of infectious bursal disease (IBD) is higher (22%) followed by colibacillosis (14.03%), Newcastle disease (ND) (13.84%), salmonellosis (12.18%), chronic respiratory disease (CRD) (11.66%), coccidiosis (7.87%), aspergillosis (7.2%), omphalitis (5.31%), fowl cholera (2.70%), fowl pox (0.28%), nutritional deficiency (0.23%), lymphoid leucosis (0.14%) and some mixed infections like salmonellosis plus E. coli (1.14%), IBD plus coccidiosis (0.71%), ND plus colibacillosis (0.71%). According to the age groups, disease prevalence was recorded as 33.41% among the age group of 21-35 days followed by 8-20 days age group (21%), 61- above days age group (17.49%), 36-60 days age group (15.92%) and 0-8 days age group (12.18%) of commercial chickens. The distribution and proportionate occurrence of diseases in chickens of Bangladesh indicated that the diseases frequently occurred in summer season (39.85 %) followed by winter (32.80%) and rainy season (27.35%).

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