Thiabendazole-resistant strains of Haemonchus and Ostertagia in California lambs.


Ten parasite-free experimental lambs were inoculated intraruminally with a mixed-larvae inoculum which contained approximately 5,000 Haemonchus contortus infective larvae. Five lambs were treated with thiabendazole (66 mg/kg of body weight) and 5 were untreated controls. All lambs were killed 35 days after inoculations were done, and parasites present were recovered. Reduction in numbers of recovered Haemonchus contortus (25.7%) and Ostertagia spp (26.8%) were not significant (P greater than 0.05).


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@article{Miller1980ThiabendazoleresistantSO, title={Thiabendazole-resistant strains of Haemonchus and Ostertagia in California lambs.}, author={J. E. Miller and Nome Baker}, journal={American journal of veterinary research}, year={1980}, volume={41 10}, pages={1674-6} }