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Inefficacy of moxidectin and doramectin against ivermectin-resistant Cooperia spp. of cattle in New Zealand

Inefficacy of moxidectin and doramectin against ivermectin-resistant Cooperia spp. of cattle in New Zealand
Peer reviewed
Vermunt JJ, West DM, Pomroy WE
New Zealand Veterinary Journal, Volume 44, Issue 5, pp 188-193, Oct 1996

Article class: Clinical Communication

Subject Terms: Alimentary system/gastroenterology, Animal remedies/veterinary medicines, Anthelmintics, Nematode, Parasite control, Parasites - internal, Treatment/therapy

Animal Type: Cattle, Livestock, Production animal, Ruminant

Publisher: Taylor and Francis

Abstract

Two cases are described in which strains of Cooperia spp. of cattle were found to be resistant to either the oral or the injectable formulations of ivermectin. Injectable moxidectin was not effective against the latter strain and doramectin was not effective against either of the ivermectin-resistant Cooperia isolates. In both cases, the anthelmintic efficacy of oral levamisole was 100%.

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