Pathological Investigation of Diseases of Broilers in Some Farms of Mymensingh

A pathological investigation was carried out at three different broiler farms around the Bangladesh Agricultural University, Mymensingh from day-old chicks up to marketing. The diseases were diagnosed both grossly and microscopically as aspergillosis, salmonellosis, choline deficiency, yolk sac infection, mycoplasma-colibacillosis complex, hydropericardium hepatitis syndrome, infectious bursal disease and pneumonia, with the case fatality rate of 77.97, 73.91, 66.67, 56.25, 50.00, 36.36, 33.33 and 18.57%, respectively. In farm no. 1, yolk sac infection, mycoplasmosis-colibacillosis complex and infectious bursal disease were diagnosed pathologically, with the morbidity and mortality rate of 2.00, 1.50, 2.25, 1.25, 1.00 and 0.50%, respectively. In farm no. 2, yolk sac infection, salmonellosis, aspergillosis, infectious bursal disease, mycoplasmosis-colibacillosis complex, hydropericardium hepatitis syndrom, pneumonia and choline deficiency were confirmed both grossly and microscopically, their morbidity and mortality rate were 1.11, 5.10, 12.00, 0.44, 0.88, 2.67, 0.67, 0.67, 0.44, 3.75, 10.00, 0.44, 0.22, 0.88, 0.22 and 0.44%, respectively. In farm no. 3, pneumonia, yolk sac infection, mycoplasmosis-colibacillosis complex, aspergillosis and hydropericardium hepatitis syndrome were diagnosed by gross and microscopic examination, their morbidity and mortality rate were 0.87, 0.65, 1.96, 1.08, 4.56, 0.22, 0.22, 1.09, 0.22 and 1.74%, respectively. The findings indicate that aspergillosis is the major disease problem in broiler farming in Mymensingh.