Efficacy of major anthelmintics for reduction of fecal shedding of strongyle-type eggs in horses in the Mid-Atlantic region of the United States.

摘要: In the last decade there have been numerous reports of anthelmintic resistant cyathostomins in many parts world. The objective present study was to evaluate efficacy commercially available anthelmintics against cyathostomin egg shedding Mid-Atlantic region United States. A total 989 horses from 67 different farms located southeastern Pennsylvania, northern Delaware, and northeastern Maryland were treated with fenbendazole, oxibendazole, pyrantel pamoate, ivermectin, or moxidectin at their recommended dosages. Fecal count reduction testing used determine each on those fecal counts ≥ 200 eggs per gram day treatment (272 horses). Decreased (reduction strongyle-type by less than 90%) found for only 6%, 21% 43% showing reductions greater 90%, respectively. macrocyclic lactones showed high all sampled this study. decreased detected adds further evidence existence throughout much eastern Findings can be create a more sustainable approach parasite control programs.