Evidence that moxidectin is a greater risk factor than ivermectin in the development of resistance to macrocyclic lactones by <i>Ostertagia</i> spp in sheep in south eastern Australia

Abstract

Use of MOX for > or =2 of the preceding 5 years was associated with a higher prevalence of resistance to ML by Ostertagia spp on sheep farms in south eastern Australia than the use of IVO.