Le Jambre L F, Royal W M
Aust Vet J. 1976 Apr;52(4):181-3. doi: 10.1111/j.1751-0813.1976.tb09467.x.
The worm burdens of Angora and Merino wethers grazing with their own species or in a mixed flock were compared over a 4 month period. Based on faecal egg counts and larval differentiation, all animals had similar levels and types of infection at the beginning of the experiment when they were 15 months old. Although the initial infection in sheep and goats was similar, sheep subsequently developed a stronger resistance to worms. Therefore, at the termination of the experiment the sheep had significantly fewer worms of all species, except Nematodirus, than did the goats. There was no significant within-host difference in worm burdens whether the animals grazed exclusively with their own species or in the mixed flock.
在4个月的时间里，对单独放牧或混群放牧的安哥拉和美利奴阉羊的蠕虫负荷进行了比较。根据粪便虫卵计数和幼虫鉴别，所有动物在15个月大开始实验时，感染水平和类型相似。虽然绵羊和山羊的初始感染情况相似，但绵羊随后对蠕虫产生了更强的抵抗力。因此，在实验结束时，除了细颈线虫外，绵羊体内所有种类的蠕虫数量都明显少于山羊。无论动物是单独与同种动物一起放牧还是在混群中放牧，宿主内蠕虫负荷没有显著差异。
