在放牧牛群中疑似发生初级光敏感性红三叶草 (Trifolium pratense)
A Tettamanti1, J M Livio2, J F Micheloud3,4,5
1Instituto de Innovación para la Producción Agropecuaria y el Desarrollo Sostenible (IPADS, INTA Balcarce-CONICET), Buenos Aires, Argentina.
New Zealand veterinary journal
|April 2, 2025
概括
阿根廷的两只牛群经历了与红三叶草 (Trifolium pratense) 消费相关的光敏化爆发. 临床症状和病理学表明红三叶草是可能的原因,需要进一步调查其有毒成分.
科学领域:
- 兽医医学 兽医医学 兽医医学
- 毒理学 毒理学 毒理学
- 动物健康 动物健康
背景情况:
- 牛的光敏化会导致严重的健康问题和经济损失.
- 识别负责主要光敏化的特定植物物种往往是具有挑战性的.
- 红三叶草 (Trifolium pratense) 是一种常见的牧场豆类,具有潜在的光毒性质.
研究的目的:
- 为了调查阿根廷的两种肉牛中光敏感性爆发的情况.
- 确定红三叶草 (Trifolium pratense) 作为致病剂的潜在作用.
- 记录与疫情相关的临床症状,病理发现和流行病学数据.
主要方法:
- 在一群354头肉牛和小牛中,对两个不同的疫情的流行病学调查.
- 临床检查受影响的动物,注意头部倾斜,皮肤亡和眼炎症等症状.
- 收集和分析血清样本以检测肝脏酶活动和耳朵皮肤活检以进行组织病理学.
- 牧场分析以评估Pithomyces chartarum的子数量.
主要成果:
- 两次爆发,累计发病率为5.6%和10.7%,记录在牛牧场牧场红三叶草主导.
- 临床症状包括头部倾斜,不安和皮肤亡; 组织病理学证实了与光敏化相容的死性皮肤炎.
- 肝酶活动在很大程度上是正常的,Pithomyces chartarum子数量很低,排除了典型的真菌诱导的光敏化.
结论:
- 流行病学和临床发现强烈表明,由于摄入红三叶草 (Trifolium pratense) 导致牛的初级光敏化.
- 这项研究强调三叶草 (Trifolium pratense) 是一种可能导致牛光敏化的潜在原因,与常见的真菌毒素不同.
- 需要进一步的研究,以确定Trifolium pratense中负责光敏化的特定有毒化合物.
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