关键词: 鲤鱼细菌性败血症, 嗜水气单胞菌, 家鱼(49RB), 水库养鱼(49RB)

Abstract: A bacterial and septicemia disease occurred in carp in 1988.The main symptom of the affected fish was that:The erythema appeared at the base of fins, in the mouth, opercula and around the anus.Petechial and ecchymotichemorrhages and erosions showed on the skin.The visceral organs were erythemic, hemorrhagic and swollen.The pathogenic bacterium was isolated from the visceral organs and the focuses on the skins of diseased fish.Artificial infection with the pure cultures succeeded.The organism was rod-shape, with a polar motile flagellum and gram-negative.It prodused cytochrome oxidase, indole, hydrogen sulfide, 2, 3 butanediol, attack glucose oxidatively and fermentatively, produced acid and gas from glucose, maltose, mannitol and sucrose, and so on.According to morphology cultrual character, phisiology and biochemistry reaction, the bacterium fit well to Aeromonas hydrophila Subsp.In addition, the susceptibility of the bacterium to some of antibiotic was put to the test.

Key words: BACTERIAL SEPTICEMIA OF CARP,AEROMONAS HYDROPHILA, CHINESE CARPS, FISH CULTURE IN RESERVOIR