三种与家禽工业密切相关的传染病病毒病毒菌株的比较致病性
Kailin Li1,2, Xinxin Niu1,2, Nan Jiang1,2
1Avian Immunosuppressive Diseases Division, State Key Laboratory for Animal Disease Control and Prevention, Harbin Veterinary Research Institute, The Chinese Academy of Agricultural Sciences, Harbin 150069, China.
Viruses
|June 28, 2023
概括
非常有毒的传染病病毒 (IBDV) 导致的死亡率超过80%,而新型IBDV变异导致严重的免疫器官损伤. 减弱IBDV没有显示任何致病性,为IBDV控制策略提供了信息.
科学领域:
- 兽医病毒学 兽医病毒学
- 禽类病理学 禽类病理学
- 免疫学 免疫学 免疫学
背景情况:
- 传染病 (IBD) 是由IBDV引起的年轻的致命疾病.
- 在东亚,极具毒性 (vvIBDV) 和新型变种 (nVarIBDV) 菌株占主导地位.
- 了解菌株的病原性对于家禽健康至关重要.
研究的目的:
- 为了比较vvIBDV,nVarIBDV和减弱IBDV (attIBDV) 的生物和病原特征.
- 评估SPF的临床症状,微病理,病毒复制和分布.
- 为IBDV流行病学,病原性和控制策略提供信息.
主要方法:
- 使用无特定病原体 (SPF) 的感染模型.
- 进行vvIBDV (HLJ0504),nVarIBDV (SHG19) 和attIBDV (Gt) 菌株的比较.
- 评估临床症状,死亡率,病毒分布,复制和炎症因素.
主要成果:
- vvIBDV表现出高致病性 (>80%的死亡率),在淋巴体器官快速复制,以及广泛的组织分布.
- nVarIBDV导致严重的囊损伤和B淋巴细胞枯竭,没有死亡率,但显著的病毒病和分泌.
- attIBDV是非致病性的;vvIBDV诱导的炎症反应高于nVarIBDV.
结论:
- vvIBDV是最致病的IBDV菌株,其次是nVarIBDV,而attIBDV是非致病的.
- 系统的比较为IBDV菌株的致病性提供了关键的见解.
- 这些发现对于制定有效的预防和控制措施来对抗家禽中各种IBDV菌株至关重要.
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