Thomas R J, Paton G, Waller P J
Vet Parasitol. 1986 Jun;21(2):127-33. doi: 10.1016/0304-4017(86)90153-6.
A simulation model which describes the pattern of increase in Ostertagia circumcincta infective larvae on pasture grazed by ewes and lambs, was used to test the effect of anthelmintic treatment at different times in the grazing season. Treatment generally resulted in a delay in the rise to peak larval count, and marked differences were recorded in two successive years, which were related to a combination of time of treatment and weather conditions.
一个模拟模型描述了在母羊和羔羊放牧的牧场上环形奥斯特线虫感染性幼虫数量增加的模式，该模型用于测试在放牧季节不同时间进行驱虫治疗的效果。治疗通常会导致幼虫数量达到峰值的时间延迟，并且在连续两年中记录到了显著差异，这与治疗时间和天气条件的综合因素有关。
