论文部分内容阅读
从患病黄鳝苗种的肝脏、消化道、血液中分离到 2株细菌 ,经腹腔人工注射及浸浴感染试验均出现与自然病例相似的症状 ,并从病鳝体内重新分离到生理生化特性与原菌株相同的细菌。经多项形态、生理生化测试 ,此 2株细菌均鉴定为温和气单胞菌 (Aeromonas sobria)。该菌对先锋霉素 、复达欣、头孢呋肟、菌必治、氟嗪酸等药物高度敏感 ,可选用这些药物拌饵投喂黄鳝苗种 ,来防治黄鳝苗种的温和气单胞菌病。免疫试验表明 ,黄鳝在免疫后 7d可以检测到抗体 ,滴度为 2 5(32 ) ,以后逐渐上升 ,2 1 d达最大值 2 1 2 ,随后下降 ,免疫保护率较对照组有明显提高
Two strains of bacteria were isolated from the liver, digestive tract and blood of diseased eel, and the symptoms similar to natural cases were found by intraperitoneal injection and immersion infection test, and the physiological and biochemical characteristics were re-isolated from diseased eel The same strain of the original bacteria. After a number of morphological, physiological and biochemical tests, these two strains of bacteria were identified as Aeromonas sobria. The bacterium is highly sensitive to such drugs as cephalosporins, diphenhydryphos, cefuroxime, bacitracin, and fluorozinc acid. These drugs can be used to feed the eel seed to control the Aeromonas sobria disease. Immune tests showed that the eel could detect antibody at 7 days after immunization with a titer of 25 (32), then gradually increased and reached a maximum of 21 1 on day 21, and then decreased. The immunoprotection rate was significantly higher than that of the control group