关键词: 鲤鱼, 细菌性败血症, 嗜水气单胞菌, 病理

Abstract: This paper reports the pathological changes about the bacterial septicemia in Carp caused by Aeromonas hydrophila subsp. hydrophila. The main lesion is that the hemorrhage appears in many tissues(especially, on the outside of the fish bodies) of the affected fish. The hyperemia and erythema appear in the mouths, eyes, opercula, the base of fins and around the anus. Petechial and ecchymotic hemorrhages, erosions and ulcers are found in the skin. The ascites appear and the visceral organs show erythema, petechial and ecchymotic hemorrhages and swelling. The histopathological changes are characterized by vacuolar degeneration and necrosis in the dermis, inflammatory edema and hemorrhage in the dermis and subcutis. The gill-lamellae shows hyperemia and exudation. The myocardium inflames acutely. The liver glycogen loses and liver cells appear as cloudy swelling, hydropic and fatty degenerations and necrosis. Acute catarrhal inflammation occurs in the intestines. The glomerulus of kidney exudate and necrosise. The hemolyse occurs in the red cells.

Key words: carp, bacterial septicemia, Aeromonas hydrophila, pathology