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宁夏地区绵羊博尔纳病病毒自然感染状况研究

Keywords: Borna病病毒,感染,巢式逆转录荧光定量PCR

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Abstract:

目的探讨中国宁夏地区绵羊博尔纳病病毒(Bornadiseasevirus,BDV)的自然感染状况,并分析比较中国宁夏地区绵羊自然感染BDVp24基因序列与国外人和动物来源BDV分离株及其标准株StrainV和He/80的同源性。方法采用巢式逆转录荧光定量PCR(FQ-nRT-PCR技术)检测了中国宁夏地区268例绵羊PBMCs中BDVp24基因片段,对阳性标本FQ-PCR产物进行基因序列测定,测序结果应用BLAST软件以及DNAsist5?0软件对测序结果分析,与国外人与动物来源的BDV分离株以及标准株StrainV和He/80进行序列比较。结果268例中4例绵羊外周血BDVp24基因片段阳性,阳性率为1?49%;测序分析结果表明,宁夏地区绵羊感染的BDVp24的核苷酸序列与马源性病毒株H3575同源性最近,同源性为98?84%(85/86),与标准株StrainV和He/80同源性为94?19%和100%。并且它们编码的氨基酸序列相同。结论HTSS宁夏地区绵羊中可能存在动物源性的BDV自然感染,该地区感染的BDVp24核苷酸序列与马源性病毒株H3575、标准株StrainV和He/80存在高度的同源性,其感染来源可能相同亦或存在相互之间感染的可能。

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