Clinical and Parasitological Evaluation of Ivermectin and Ivermectin + Pyrantel Against Oxyuris Equi in Equines

•-Ivermectin (IVM) incomplete oxyuricidal efficacy, whereas the combination of ivermectin + pyrantel pamoate (IVM + PYR) showed 100% therapeutic efficacy.•Neither formulation protected all the animals throughout the prepatent period of the parasite, but IVM + PYR offered longer protection than IVM.•-Animals treated with IVM were 4.5-fold more likely to present clinical signs than those treated with IVM + PYR.•-A greater number of clinical signs was related to earlier recurrence of the disease post-treatment.