从中国山东分离的塞内卡病毒的进化特征和病原性
Yubei Dong1, Jiacheng Wen1, Chengyi Guo1
1Key Laboratory of Animal Diseases Diagnostic and Immunology, Ministry of Agriculture, MOE International Joint Collaborative Research Laboratory for Animal Health & Food Safety, College of Veterinary Medicine, Nanjing Agricultural University, Nanjing 210095, China.
Virus research
|August 17, 2025
概括
猪中塞内卡病毒A (SVA) 感染会导致囊泡病变和减少小猪产量. 这项研究描述了一种新的SVA菌株,SVA/SD/2023,详细介绍了其基因组,保存序列和对感染动物的影响,提供了有关疾病进展的见解.
科学领域:
- 兽医病毒学 兽医病毒学
- 皮科纳病毒科 科研研究
- 动物疾病的发病因子 动物疾病的发病因子
背景情况:
- 塞内卡病毒A (SVA) 由于囊泡病变和降低新生猪产量,导致猪生产造成重大经济损失.
- 了解SVA流行病学和病原性对于制定有效的控制策略至关重要.
研究的目的:
- 来自中国北部的新型塞内卡病毒A菌株SVA/SD/2023的分离和鉴定.
- 确定完整的基因组序列并分析SVA/SD/2023菌株的遗传相关性.
- 研究感染SVA/SD/2023.23的动物的临床症状和免疫反应.
主要方法:
- 病毒隔离和细胞培养 (BHK-21细胞).
- 基因组测序,PCR,免疫光和西式涂抹.
- 电子显微镜用于病毒粒子形态学.
- 遗传学分析和序列同质性比较.
- 动物接种研究,以评估临床症状和免疫反应.
主要成果:
- 成功分离了SVA/SD/2023菌株,并促进了BHK-21细胞的增殖.
- 确定了完整的7286核酸基因组,表现出典型的皮科纳病毒特征.
- 与其他SVA菌株,特别是USA/IA46008/2015观察到高氨基酸序列同质性 (高达99.4%).
- 受感染的动物表现出食欲下降,发烧和抑郁症等症状,但没有死亡率.
- 检测到塞内卡病毒A VP2和中和抗体的水平增加,与病毒载量下降相关.
结论:
- 这种SVA/SD/2023菌株在遗传上是保存的,与其他SVA分离物有着密切的相似性.
- 感染诱导宿主免疫反应,其特点是抗体的产生和病毒的清除.
- 这项研究为进一步研究猪中SVA病原和疾病管理提供了基础数据.
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