lymphoid leucosis and coligranoluma in a budgerigar (melopsittacus undulatus)

an adult female budgerigar (melopsittacus undulatus) presented with abdominal enlargement. the condition of the bird deteriorated after needle aspiration for cytological examination. the budgerigar was euthanatized and a complete necropsy was performed. microscopic sections were prepared and stained with hematoxylin and eosin, gram staining, periodic acid-schiff (pas) and acid-fast staining. escherichia coli was isolated in pure culture. necropsy revealed the pres­ence of granulo­matous lesions of varying sizes at different locations and hepatomegaly, oviduct impaction and oophoritis. histopathologically, typical granuloma with a central area of coagulation necrosis and bacterial colonies surrounded by lymphocytes, macrophages and multinucleated giant cells were found. these granulomas were present in the liver, oviduct and intestinal tract. a sheet of neoplastic cells and disruption of the normal hepatic architecture was seen. the diagnosis was lymphoid leucosis and coligranuloma.