Critical tests and clinical trials on oxibendazole in horses with special reference to removal of Parascaris equorum.
The efficacy of oxibendazole given at dose level of 10 mg/kg of body weight was determined by 10 critical tests in foals and by 2 clinical trials in 20 foals (16 treated, 4 nontreated), with special interest in the drug activity against Parascaris equorum. The drug was uniformly efficacious (100%) against P equorum in the 10 critical-test foals, each having between 22 and 236 ascarids. Posttreatment reductions of ascarid egg counts in fecal samples were also 100% in suckling foals treated with oxibendazole given as a drench. Ascarid eggs did not reappear in fecal samples until the 8th week after foals were treated. A paste formulation of oxibendazole at 10 mg/kg also eliminated ascarid eggs from feces of 12 suckling foals. Strongyle EPG were markedly reduced by oxibendazole in the 10 critical-test foals and in 16 treated sucklings in the clinical trials. Egg and larval count data on foals in both the critical tests and the clinical trials also indicated oxibendazole was active against Strongyloides westeri. Untoward effects of treatment with oxibendazole were not observed.[1]References
- Critical tests and clinical trials on oxibendazole in horses with special reference to removal of Parascaris equorum. Drudge, J.H., Lyons, E.T., Tolliver, S.C., Kubis, J.E. Am. J. Vet. Res. (1979) [Pubmed]
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