PATHOLOGICAL INVESTIGATION OF AVIAN COCCIDIOSIS IN SMALL SCALE COMMERCIAL BROILER FARMS IN DINAJPUR DISTRICTS

Abstract

The study was designed to investigate the pathological conditions of avian coccidiosis in the small scale commercial broiler farms at different region at Dinajpur districts in a short six month duration starting from July, 2012 to December, 2012. Total 338 diseased and dead birds (From 100 farms) were examined out of which 44 (8.32%) birds were found to be positive for coccidiosis. A thorough clinical and necropsy examination was done and the characteristics clinical signs and gross lesions were recorded. The clinical signs of the affected birds were bloody diarrhea, anemia, depression, ruffled feather, reduction of feed and water intake, drooping wings. At necropsy, enlargement and discoloration of caecum with numerous hemorrhage spots, blood mixed intestinal contents in the intestinal lumen, reddish to brown contents in the intestinal lumen, hemorrhage on the intestinal wall, and profuse hemorrhage on intestinal mucosa were found. Different organs mainly caecum and intestine were collected, preserved and processed for histopathological examination and histpathologically, distortion of normal architecture of intestine and desquamation of lining epithelia, formation of tissue debris on the intestinal mucosa and necrotic cells infiltration in the lamina proprea and submucosa, degeneration of epithelial cells, glands, intestinal villi and Infiltration of inflammatory cell in the musculature were also present.