育肥猪血清中猪细小病毒16WS株的分离与鉴定
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湖南省科学技术厅重点项目(2012NK2001)


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    摘要:

    从一育肥猪早、中期生产状况差的猪场收集猪血清214份,采用猪细小病毒(PPV)特异性检测引物进行PCR检测,选取1份阳性血清接种猪睾丸细胞(ST)进行PPV分离、部分生物学特性研究,以及PPV部分基因序列分析。结果表明:在15、16、17、18、22周龄猪血清中均检测到PPV,检测阳性率分别为10%、40%、20%、15.4%、9%,而从2~14及24周龄的猪血清中没有检测到PPV;病毒分离和部分生物学特性研究结果表明,从血清中分离的PPV在ST细胞上传到第5代能够出现较稳定的细胞病变(CPE),病毒血凝效价为28;PPV部分基因序列与GenBank收录的PPV毒株序列同源性在98%以上,其中与2012年西北农林科技大学时乐[1]分离的YL毒株同源性高达99.1%。以上结果证实本研究分离到PPV,且说明PPV在采样猪场的保育后期和育肥前、中期猪血清中具有较高的阳性率。

    Abstract:

    We collected 214 sera samples from a farm which its growing-finishing pigs with poor health conditions and detected porcine parvovirus (PPV) by PCR. A sample contained PPV identified by PCR was inoculated into ST cells to isolate PPV and the isolate was sequenced and we described partial of its biological characteristics. We found that there were no sera contain PPV detected by PCR from pigs aged from 2 to 14 weeks and 24 week, however, PPV can be detected from serum of pigs aged from 15 to 18 and 22 weeks with positive rate 10%, 40%, 20%, 15.4% and 9%, respectively. The isolate was serially passaged in ST cells and the ST showed stable cytopathic effects when the isolate passaged to the fifth generation. Hemagglutination titer of the isolate was 28 by the hemagglutination assay. We also found that the partial genome of the isolate share more than 98% identity with PPV genomes found in GenBank, especially as high as 99.1% with the strain YL which was isolated by Shi[1] in 2012. Therefore, we demonstrated that the isolate is PPV and nursing pigs in late stage as well as fattening pigs in early stage have a high PPV rate in this farm.

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吴海超,胡呈才,刘崇灵,李润成,余兴龙.育肥猪血清中猪细小病毒16WS株的分离与鉴定[J].湖南农业大学学报:自然科学版,2014,40(5):.

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  • 最后修改日期:2014-10-01
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  • 在线发布日期: 2014-10-30
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