Feline infectious peritonitis (FIP) is irremediable disease of cats. It is known to be caused by corona virus. During routine necropsy a case of peritonitis was encountered in white Persian cat which was investigated for pathology. Fever, anorexia, jaundice, diarrhoea, weight loss and dyspnoea were the clinical sings reported. Carcass was icteric. Spleen revealed yellowish-white raised nodule scattered over its surface. Liver revealed multifocal necrosis. Kidney was severely congested. Fibrinous exudates were deposited on various visceral organs. Abdominal cavity was filled with yellow, viscous fluid. Histopathological examination was carried out to determine the extent of damage to affected organs. Diagnosis was achieved on basis of clinical signs and pathognomonic histopathological lesions.
