CLINICO-PATHOLOGICAL INVESTIGATION OF CHICKEN COCCIDIOSIS AT DIFFERENT UPAZILA IN BOGURA DISTRICT

Abstract

The study was conducted to investigate the clinico-pathological status of chicken coccidiosis in the small scale commercial farms at different upazilla like Sadar, Gabtali, Sariakandi, Sherpur, Shajahanpur, Shibganj, Adamdigi, Dhunat, Sonatala, Dhupchachia in Bogura district from July to December, 2018. A through clinical and necropsy examination was done to record characteristics clinical signs and gross lesions. Different organs mainly small intestine and caecum were collected, preserved and processed for histopathological examination. A total of 343 diseased and dead chickens were examined out of 52 (20.6% in broiler, 10.47% in sonali, 10.25% in layer) chickens were found to be positive for chicken coccidiosis. The proportional mortality rates of coccidiosis were 19.25%, 21.42%, 8.23%, 7.5% respectively in age group of 0-4 weeks, 5-6 weeks, 7-8 weeks and above 8 weeks. The mortality rate was highest in 5-6 weeks age group (21.42%) and lowest in above 8 weeks age group (7.5%). The clinical signs of affected chickens were depression, ruffled feather, bloody diarrhoea, anaemia, drooping wings, reduction of feed and water intake. At necropsy deeper layers contained large areas of congestion and pinkish or blood tinged catarrhal exudates. Histopathologically, destruction of normal architecture of caecum and proliferation of fibrous connective tissue of liver. The villi of the mucosa were destroyed and disorganized and there was no continuation in the lining epithelial cells of villi.