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在健康的瑞士牛群中对Chlamydia pecorum进行了纵向研究
Samuel Loehrer1, Fabian Hagenbuch1, Hanna Marti1
1Institute of Veterinary Pathology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
PloS one
|December 11, 2023
概括
克拉米迪亚虫感染在健康的瑞士牛中普遍存在,特别是在年轻动物中. 这项纵向研究追踪了一年多的瑞士群体感染动态.
科学领域:
- 兽医微生物学 兽医微生物学
- 动物健康 动物健康
- 牲畜疾病 牲畜疾病
背景情况:
- 克拉米迪亚虫是一种重要的畜牧病原体,在瑞士的流行数据有限.
- 了解它在瑞士牛群中的流行病学对于疾病管理至关重要.
研究的目的:
- 为了确定在瑞士牛群中Chlamydia pecorum的流行率和感染动态.
- 为了研究与年龄相关的感染和流产模式的差异.
主要方法:
- 在一年内对308头牛 (奶牛,牛肉,小牛) 进行了纵向研究.
- 收集直肠和结膜拭子 (n=1564) 与克拉米迪亚查和C. pecorum特定的qPCR.
- 在阳性样本中确定细菌负载.
主要成果:
- 克拉米迪亚是唯一被检测到的克拉米迪亚菌种.
- 患病率因年龄和类型而异:奶牛 (5.2-11.4%),肉牛 (38.1-61.5%),小牛 (55-100%).
- 结膜脱落比直肠脱落更频繁,但直肠细菌负载更高;年轻动物的患病率和负载更高.
结论:
- 克拉米迪亚虫在健康的瑞士牛群中是特有的,感染发生在生命的早期.
- 有证据表明,随着时间的推移,免疫力可能会发展.
- 胃肠道可能不是乳牛中C. pecorum的主要部位.
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