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1999年 6月从江苏省启东市某水产养殖场患病濒死的中华绒螯蟹肝胰腺中分离出 3株致病菌 .经回感试验证实了菌株在 2 4小时内对健康蟹的致死率分别为 10 0 %、75 %和 6 0 % ,回感温度升高可导致死亡时间缩短 .经细菌形态、生理生化特性等鉴定为嗜水气单胞菌 ,分别定名为ES 1、ES 2和ES 3菌株 .3株菌的最适生长温度在 35℃ ,pH8,NaCl浓度 0～ 1% .
Three pathogenic bacteria were isolated from hepatopancreas of dwarfish Eriocheir sinensis in an aquaculture farm in Qidong, Jiangsu Province in June 1999. The bacilli were confirmed to be dead to healthy crab in 24 hours 10%, 75% and 60% respectively, and the increase of the sensory temperature could lead to the shortening of the death time.Airomonas hydrophila was identified as the bacterial morphology, physiological and biochemical characteristics and named ES 1, ES 2 And ES 3 strains.The optimum growth temperature of the three strains was 35 ℃, pH8, NaCl concentration 0 ~ 1%.