【摘要】 从某养殖场患出血性败血症的高体革(鱼刺)(Scortum bacoo)中分离到一株细菌,人工回染健康高体革(鱼刺)证明该菌株为其致病菌,并具较强毒力,LD50为3.48×105 CFU。该菌株在形态、多项重要的生理生化指标与海豚链球菌(Streptococcus iniae)相同,因此可初步鉴定该菌株即为溶血性海豚链球菌。病理学观察表明该菌株主要引起高体革(鱼刺)的肝肾病变,药敏试验表明该菌株对红霉素、复合磺胺、头孢哌酮等多种抗生素敏感。更多还原

【Abstract】 A bacterium strain was isolated from the haemorrhagic blood poisoning of Scortum bacoo in a aquaculture farm. The strain was confirmed to be the pathogen of the disease by artificial infection test. Its LD50 is 3.48 × 105 CFU having high toxicity. According to the results of morphological features, physiological and biochemical characteristics were very similar to those of Streptococcus iniae, the strain was identified as haemolytic Streptococcus iniae . Meanwhile, the pathology and drug sensitivity tests were conducted. The bacteria harmed primarily the fish’ s liver and kidney and were sensitive to some antibiotics, for example, erythromycinum, compound sulfonamide and cefoperazone.更多还原