在疾病爆发地点的AMD病毒变异中的遗传差异
Marcin Kondracki1, Andrzej Jakubczak1, Marek Kowalczyk2
1Institute of Biological Basis of Animal Production, University of Life Sciences in Lublin, Akademicka 13, 20-950, Lublin, Poland.
Virology
|August 1, 2023
概括
阿列乌提亚鱼疾病病毒 (AMDV) 导致了大量的鱼损失. 分子分析确定了两种AMDV变种,A组 (与非致病菌株非常相似) 和B组,对于控制养疫情至关重要.
科学领域:
- 兽医病毒学 兽医病毒学
- 分子流行病学分子流行病学
- 动物疾病控制和控制
背景情况:
- 阿勒岛病病毒 (AMDV) 通过生殖失败和高死亡率,在养殖中造成大量经济损失.
- 病毒的环境持久性和缺乏有效的治疗方法需要研究新的控制策略.
- 了解AMDV遗传多样性是开发疫情制和预防方法的关键.
研究的目的:
- 为了研究在经历大规模死亡率的子群体中AMDV的分子变异.
- 为了识别和表征在拉脱维亚养殖场存在的不同AMDV菌株.
主要方法:
- 尸体死后从已故的子中取下脏组织样本.
- 聚合酶链反应 (PCR) 和定量PCR (qPCR) 用于检测病毒遗传物质.
- 用DNA测序和生物信息分析来区分病毒变异.
主要成果:
- 在所有测试的脏样本中确认了AMDV遗传物质.
- 确定了两个不同的AMDV隔离组:A组 (占主导地位,>83%) 和B组.
- A组分离物与非致病性AMDV-G菌株相似度高于95%,而B组分离物与非致病性AMDV-G菌株相似度为~86%.
- 病毒载量很高 (平均10^8个副本),并且在不同组之间没有显著差异.
结论:
- 分子分析揭示了在受影响的子种群中循环的独特的AMDV变体.
- 虽然血清学测试对查有用,但它们不足以完全消除病毒.
- 将血清学查与先进的分子技术用于载体和传播识别相结合,对于控制AMDV疫情至关重要.
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