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在中国出现了一种与猪生殖失败相关的新型CRESS-DNA病毒
Xianhui Liu1, Yixuan Li1,2, Jian Xiao3
1State Key Laboratory of Swine and Poultry Breeding Industry, National Engineering Research Center for Breeding Swine Industry, College of Animal Science, South China Agricultural University, Guangzhou, China, scau.edu.cn.
Transboundary and emerging diseases
|February 9, 2026
概括
一种新的猪大病毒 (PMCV) 已经在猪身上出现,导致生殖问题. 这种循环Rep编码的单链DNA病毒在遗传上与已知的循环病毒截然不同.
科学领域:
- 病毒学 病毒学
- 动物健康 动物健康
- 基因组学就是基因组学.
背景情况:
- 循环复制编码单链 (CRESS) DNA 病毒越来越多地与各种宿主中的严重疾病有关.
- 猪圈病毒 (PCV) 是已知的猪病原体,之前已经确定了五种类型.
研究的目的:
- 为了确定未被诊断的生殖障碍在猪中爆发的致病原体.
- 在受影响的猪中检测到的一种新型CRESS DNA病毒的特征.
主要方法:
- 来自受影响农场的死生猪的病毒基因组分析.
- 对病毒的Rep蛋白进行生物化学分析.
- 遗传学分析以确定进化关系.
主要成果:
- 一种新型病毒,猪大环病毒 (PMCV),被确定具有一个大型的9426nt基因组,编码九个开放的读取.
- 证实PMCV是一种CRESS DNA病毒,但其Rep蛋白与已知的PCV和人类CRESS DNA病毒具有低序列相同性 (<23.6%).
- 遗传学分析将PMCV置于未知的CRESS DNA病毒家族中.
- 在中国,PMCV在24%的检测样本和41.18%的猪场中被检测出来.
结论:
- 猪大环病毒 (PMCV) 是一种新发现的猪CRESS DNA病毒.
- PMCV独特的基因构成表明它属于一种新型病毒家族.
- 在中国猪种群中PMCV的流行程度突显了其出现以及对其致病性和流行病学的进一步研究的需要.
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