【摘 要】
：
通过鸭胚接种,从山东和安徽两地疑似鸭瘟临床病例中分离鸭瘟病毒,分别命名为SD株和AH株.根据鸭瘟病毒疫苗株UL26-UL30的基因序列,设计引物,采用聚合酶链式反应(PCR)扩增UL27(
【机 构】
：
南京农业大学农业部动物疫病诊断与免疫重点开放实验室
论文部分内容阅读
通过鸭胚接种,从山东和安徽两地疑似鸭瘟临床病例中分离鸭瘟病毒,分别命名为SD株和AH株.根据鸭瘟病毒疫苗株UL26-UL30的基因序列,设计引物,采用聚合酶链式反应(PCR)扩增UL27(gB的全基因,并对扩增的片段进行测序.结果表明,扩增片段包括完整的gB基因,长度均为3 003 bp,2株鸭瘟病毒分离株与鸭瘟病毒疫苗株的gB基因同源性均为99.8％,并且分别发生4个和2个氨基酸的变异.2分离株无血凝特性,鸭胚半数致死量DELD50分别为10-4.5/0.2 mL和10-4.35/0.2 mL,动物回归试验可致15日龄雏鸭死亡,鉴定为鸭瘟病毒强毒株.
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