| dc.description.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. | en_US |
