Theileria orientalis Ikeda 在美国阿拉巴马州的牛场
Nneka Iduu1, Subarna Barua1, Shollie Falkenberg1
1Department of Pathobiology, College of Veterinary Medicine, Auburn University, Auburn, AL 36849, USA.
Veterinary sciences
|November 24, 2023
概括
导致经济损失的牛寄生虫Theileria orientalis Ikeda已经在阿拉巴马州被发现. 研究人员证实了它在牛群中的存在,突出了其已知的媒介之外的潜在传播风险.
科学领域:
- 兽医寄生虫学 兽医寄生虫学
- 分子诊断学 分子诊断学
- 动物健康经济学 动物健康经济学
背景情况:
- Theileria orientalis Ikeda是一种在亚洲,新西兰和澳大利亚普遍存在的具有经济意义的牛寄生虫.
- 自2017年以来,T. orientalis Ikeda已经在美国七个州被发现,引发了人们对其传播和对美国牛的影响的担忧.
研究的目的:
- 在美国阿拉巴马州的牛群中检测和描述Theileria orientalis Ikeda.
- 评估阿拉巴马州牛群中T. orientalis Ikeda的流行率和遗传特征.
主要方法:
- 来自阿拉巴马州219头牛的血液样本使用验证的PCR测试对Theileria进行了分析.
- 进行了MPSP基因的DNA测序,以确定T. orientalis基因型并将其与已知的菌株进行比较.
主要成果:
- 阿拉巴马州的两头牛对T. orientalis Ikeda的检测呈阳性,MPSP基因序列显示100%与已知的菌株匹配.
- 在受感染的牛群中检测到T. orientalis Ikeda的大量副本,这表明病原体负担很大.
- 已知的载体Haemaphysalis longicornis在阿拉巴马州没有被发现,这表明了其他传播途径.
结论:
- 在阿拉巴马州的牛群中存在Theileria orientalis Ikeda,这对美国的畜牧业构成潜在威胁.
- 在看似健康的牛群中,持久性感染和高病原体负载表明有效的传播机制可能是活跃的.
- 进一步监测T. orientalis Ikeda及其在美国的载体对于了解和管理其传播和病原性至关重要.
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