Abstract
Studies indicate that the efficacy of Anthelmintics (AH) can be restored by replacing the parasite population in sheep, here called Worm Replacement (WR). Thus, we intend to evaluate and monitor the effect of partial and total replacement of the population of Haemonchus contortus in different sheep breeds (White Dorper, Santa Inês e Texel) on the anthelmintic resistance status for five ye…