北京地区鲤科鱼暴发性传染病的病原研究

本文报道了北京地区从自然患暴发性传染病的鲢、鳙、鲤等鱼体上分离到16个菌株，其中有8株菌致病力明显，特别是SC96-1-1和SC96-2-4等株菌，能使受试鱼感染显症和致死，仅需6～24 h，其发病率达100％。经对该菌进行形态、生理生化特性测定及分类鉴定后，确认该菌是一种革兰氏阴性菌，为具有运动力的短杆菌，有如下特点：氧化酶和V-P反应均呈阳性，发酵葡萄糖产酸、产气，发酵甘露醇，不发酵肌醇，不分解脲素。并证实北京地区暴发性传染病病原为嗜水产气单胞菌(Aeromonas hydrophila)。该结果为进一步防治北京地区鲤科鱼暴发性传染病提供了科学依据。

Study on the pathogen of epidemic septicemia occurred in Cyprinoid fishes in Beijing, China

This paper reported sixteen bacterial strains isolated from fishes naturally infected by epidemic septicemia (including silver carp , bighead carp and common carp) . Of them , eight evidently caused disease , especially SC96-1-1 and SC96-2-4 caused deadly disease and the incidence is up to 100 % during 4～24 hours.All isolates were determined in growth , physiological characteristics and classification. The results showed thatthey shared following characteristics : gram-negative rod , motile , oxidase positive , V-P positive , glucose andmannitol fermentative , but not inositol fermentative , not urea decomposite. These features indicated that thepathogen of epidemic septicemia occurred in Beijing belonged to Aeromonas hydrophila. This result providesscientific basis for the prevention and cure of this infectious disease.