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Lack of effects of quebracho and sainfoin hay on incoming third-stage larvae of Haemonchus contortus in goats

机译:quebracho和sainfoin干草对山羊的Haemonchus contortus第三阶段幼虫的影响不足

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摘要

The effects of tannins on adult populations of Haemonchus contortus, Trichostrongylus colubriformis and Teladorsagia circumcincta in goats are characterised mainly by a decrease in egg excretion without any significant changes in worm number. In contrast, the impact of tannins on T. colubriformis or T. circumcincta third-stage larvae (L3) is associated with a significant reduction in worm establishment. The objective of the present study was to examine the effects of quebracho extract tannins on H. contortus L3. The consequences of consumption of sainfoin hay were also examined. Twenty-one naive kids were divided into three experimental groups. Group Q received quebracho extract and group S received sainfoin hay from days D3 to D5. Group C remained as an infected control group. All kids received 1500 L3 H. contortus on D0, D1 and D2. On D18, post-infection, the kids were slaughtered and the worm populations compared in the different groups. Compared to the control values, the worm counts decreased, respectively, by 33% and 38% in groups Q and S but the differences were not significant. No differences were found in pathophysiological measurements between the three groups. The results confirm differences in tannin effect according to nematode species but not parasitic stage.
机译:单宁对山羊肉中的捻转血矛线虫,毛圆线虫和圆线虫的成年种群的影响主要特征是卵的排泄减少而蠕虫数量没有明显变化。相反,单宁酸对co.colubriformis或T.circumcincta第三阶段幼虫(L3)的影响与蠕虫的形成显着减少有关。本研究的目的是检查栎树提取物单宁酸对Contortus L3的影响。还研究了食用皂素干草的后果。 21个天真的孩子分为三个实验组。从第3天到第5天,Q组接受了quebracho提取物,S组接受了皂甙干草。 C组仍然是感染的对照组。所有孩子都在D0,D1和D2上接受了1500 L3捻转嗜血杆菌。在感染后的第18天,对孩子进行了屠宰,并比较了不同组中的蠕虫种群。与对照组相比,Q和S组的蠕虫数量分别减少了33%和38%,但差异不显着。三组之间在病理生理学测量上没有发现差异。结果证实了根据线虫种类,单宁作用的差异,但不是寄生阶段。

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