血清流行,隔离,综合性表征和致病性Clostridium perfringens菌株来自中国西的雅克
Dongjing Wang1, Jiangyong Zeng2, Chunfa Liu3
1Institute of Animal Husbandry and Veterinary Medicine, Xizang Academy of Agricultural and Animal Husbandry Sciences, Lhasa, 850000, Xizang, China.
Scientific reports
|March 5, 2026
概括
甲型菌被发现在高海拔雅克中. 这种多药耐药,高病毒性菌株会引起严重的疾病,因此需要在雅克养殖中加强监测和控制.
科学领域:
- 兽医微生物学 兽医微生物学
- 动物健康 动物健康
- 高海拔地区的生态学
背景情况:
- 杆菌 (Clostridium perfringens) 是一个重要的牲畜病原体.
- 它在高海拔雅克的流行和特征在很大程度上是未知的.
- 了解其生态对于在这些独特环境中预防疾病至关重要.
研究的目的:
- 调查西自治区的雅克中Clostridium perfringens的流行率和危险因素.
- 为了表征一个代表性的Clostridium perfringens从雅克中分离出来.
- 评估孤立菌株的毒性和抗菌素耐药性.
主要方法:
- 在八个县对922只克进行了血清学查.
- 多变量逻辑回归用于风险因素分析.
- 异型,基因组 (16S rRNA,全基因组测序),和毒素基因类型的隔离.
- 抗微生物耐药性分析和小鼠感染模型.
主要成果:
- 个体水平的抗体患病率为0.76%,群体水平为25%.
- 居住在4000米以下是唯一重要的风险因素 (aOR=8.75).
- 标志性分离物 (CPTibet-Y1) 是A型毒素,在小鼠中具有多种耐药性和高毒性,导致100%的死亡率和严重的病理.
结论:
- 这项研究证实了高海拔雅克中存在多抗药性,高毒性Clostridium perfringens类型A的存在.
- 低海拔是感染的关键风险因素.
- 加强监测和有针对性的控制策略对于青海-西藏高原的雅克养殖社区至关重要.
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