Recent Investigations on the Prevalence of Poultry Diseases

This study was performed in an attempt to investigate the prevalence of poultry diseases in the Barishal district of Bangladesh during the period from October 2018 to September 2019. A total of 863 poultry birds of different ages either dead or sick were examined for the study. History, owner’s complaints, clinical signs, and post-mortem findings of dead and sacrificed birds were considered for the diagnosis of the diseases. The prevalence of diseases was recorded in layers (n=416) 48.20%, broilers (n=305) 35.34% and sonali chickens (n=142) 16.45%. Among the diseases, the overall prevalence of infectious bursal disease (IBD) was found highest (18.08%) followed by salmonellosis (15.41%), newcastle disease (ND) (13.33%), mycoplasmosis / chronic respiratory disease (CRD) (12.28%), colibacillosis (10.31%), coccidiosis (7.53%), infectious bronchitis (7.18%), aspergillosis (5.68%), omphalitis (2.55%), fowl cholera (2.43%), infectious coryza (2.09%), fowl pox (1.51%), necrotic enteritis (1.16%), and marek's disease (0.46%). Highest prevalence 17.79%, 27.87%, and 22.54% were recorded in salmonellosis, IBD, and ND respectively in layers, broilers, and sonali chickens. Based on seasonal variations, it was found that most of the diseases occurred in the summer (39.75%) followed by (32.33%) and (27.93%) respectively in winter and rainy season. This study suggests that appropriate vaccination, strict biosecurity, proper hygienic management, and other preventive measures should be taken into consideration for effective control of the diseases to establish sustainable development of poultry farming in these areas.