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PNEUMOMYCOSIS IN CHICKENS: CLINICAL, PATHOLOGICAL AND THERAPEUTICAL INVESTIGATION (Pages : 16 - 21)

M. N. ISLAM, S. M. H. RASHID, M. S. B. JULI, U. K. RIMA, AND M. KHATUN

Pneumomycosis (Aspergillosis, Mycotic pneumonia, Brooder pneumonia) in commercial chickens (Broiler, layer, cockerel) was investigated around Hajee Mohammad Danesh Science and Technology University at Dinajpur of Bangladesh from 2007 to 2008 and diagnosed based on pathological and therapeutical findings. The disease is commonly found in commercial poultry farms and causes moderate to severe economic loss to the small scale poultry farmers by a remarkable mortality of the birds and their reduced weight gain. Among the 11 incidences in the commercial chickens, 6 in broiler, 3 in layer and 2 in cockerel flocks were detected during the course of the study. The number of the birds/farms was variable and they were reared on litter. The clinical signs as well as necropsy findings were noted during the physical visit of the farms and in laboratory when the birds were submitted. The recording of morbidity and mortality rates, histopathological study of the preserved lung samples and therapeutic managements of the affected flocks without performing drug sensitivity were also done. The both morbidity and mortality rates were not more than 70% and 9.03%, respectively. Highest mortality rate was found in cockerel (9.03%) followed by broiler (5.48%) and layer (1.92%), respectively. The major clinical signs were varying degrees of dyspnea, gasping, whitish watery diarrhoea, progressive emaciation, remarkable dehydration and death. Circumscribed granulomatous nodules in the lungs, airsacs, and peritoneal cavity were the striking gross morbid lesions. The lungs were histopathologically characterized as severe necrosis of alveolar epithelia, purple coloured granular mass centrally of the nodules surrounded by zone of inflammation, mononuclear cells infiltration, highly congested blood vessels. Better response to sulphadiazine-trimethoprim combination along with copper sulphate solution was observed.Download


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