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鸡传染性支气管炎病毒CK/CH/LDL05Ⅱ的分离鉴定及生物学特性 被引量:2

IsoIation and identification of an avian infectious bronchitis virus CK/CH/LDL05Ⅱ in China
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摘要 采取2005年大连某鸡场发病鸡群萎缩的输卵管进行处理,经鸡胚尿囊腔接种SPF鸡胚,分离到1株病毒。通过致SPF鸡胚病变特征、病毒对鸡外周血红细胞凝集特性、病毒粒子形态学特征、对SPF鸡致病性及死亡率等方面的研究,发现病毒经鸡胚传毒至第3代可致鸡胚生长发育障碍(侏儒胚)、胚体严重卷曲且大腿及尾部有点状出血;病毒囊液不凝集鸡的外周血红细胞;在电镜下呈球形,病毒囊膜表面有疏松排列的棒状纤突,具有冠状病毒粒子的形态特征;以105.5×EID50/0.1mL的病毒接种15日龄的SPF雏鸡,鸡群发病率为22/22(100%),死亡率为12/22(54.5%)。根据以上结果确定该病毒为冠状病毒,命名为CK/CH/LDL05Ⅱ。在此基础上,用RT-PCR对CK/CH/LDL05Ⅱ的核蛋白基因进行了克隆、测序和分析。与GenBank中26株IBV参考毒株核蛋白基因序列进行比较分析,发现该毒株与我国2004年分离IBV毒株CK/CH/LDL/04Ⅱ的N基因推导氨基酸同源性最高(97.5%),表明两者具有较近的亲缘关系。这一结果不但从分子水平证实毒株CK/CH/LDL05Ⅱ是鸡传染性支气管炎病毒,而且表明该血清型的毒株最近连续2年存在于大连市的不同鸡场。 A field strain of IBV was isolated from oviduct of the affected young layer flocks in Dalian city,China.Their characterization,such as pathological role to chicken embryo,hemagglutination activity,morphological characterization and virus pathological role to SPF chickens,were studied.The results demonstrated that typical lesions of the embryos including dwarfing,curling,and hemorrhage were observed in the third passage.Furthermore,the virus did not hemagglutinate chicken red blood cells and showed as typica...
出处 《中国兽医学报》 CAS CSCD 北大核心 2008年第8期883-887,共5页 Chinese Journal of Veterinary Science
基金 “十一五”国家科技支撑计划重大项目
关键词 鸡传染性支气管炎病毒 分离鉴定 核蛋白基因 avian infectious bronchitis virus isolation identification
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参考文献18

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