RETROSPECTIVE STUDY OF SOME POULTRY DISEASES AT GAIBANDHA DISTRICT IN BANGLADESH
A total of 325 chickens, duck and pigeon, dead or sick, brought for diagnosis to the FDIL (field disease investigation laboratory), Guibandha during the period from July, 2005 to June, 2006 were taken into consideration in this study to know the seasonal occurrence of diseases and their comparison and to identify the effect of season and age for developing the diseases. Among the examined birds 251 were chicken including local and commercial birds, 67 were ducks and 7 were pigeon. The diagnosed diseases were parasitic diseases including coccidiosis, ascaridiosis and schistosomiasis; viral diseases including new castle disease (ND), infectious bursal disease (IBD), avian leucosis (AL) and duck plague (DP), bacterial diseases including salmonellosis, pasteurellosis and colibacillosis, non-infectious diseases including ascites, egg bound, cannibalism and fatty liver hemorrhagic disease, MC complex (mycoplasmosis-colibacillosis complex) and fungal infection including aspergillosis. The occurrence of parasitic diseases (86.2%) was the highest, followed by viral diseases (32.6%), bacterial diseases (25.8%) and non-infectious diseases (12.9%). In chickens the occurrence of parasitic diseases was the highest (88.4%) followed by bacterial diseases (28.3%), viral diseases (27.1%), non-infectious diseases (16.30%), MC complex (3.6%) and aspergillosis (1.6%). Bacterial diseases were significantly (p<0.05) higher in winter as well as in rainy season compared to summer season. Occurrence of pasteurellosis was significantly (p<0.05) higher in winter (p<0.05) and rainy (p<0.01) season compared to summer season. Parasitic diseases were significantly (p<0.01) higher in winter (97.2%) compared to summer (83.3%). The occurrence of coccidiosis was 88% and it was significantly (p<0.01) higher in winter (97.2%) compared to summer (82.2%). Egg bound was present among 10% birds and it was significantly (p<0.05) lower in rainy season compared to summer season. In case of ducks the presence of parasitic diseases was the highest (77.60%) followed by viral diseases (56.7%), bacterial diseases (16.40%) and non-infectious diseases (1.50%). Duck plague was present in 56.7% birds and it was significantly (p<0.05) higher in winter (80%) season compared to summer (44.8%) season. The occurrence of duck plague was observed in 56.70% birds and it was significantly (p<0.05) higher in laying stage (67.60%) than pullet stage (43.30%). Incase of pigeon 28.60% birds showed bacterial infections and 85.70% birds showed parasitic infestations. Present study suggests that various infectious and non-infectious diseases are prevalent among the poultry of Guibandha district. So effective control measures should be taken to minimize this problem.