the efficacy of monepantel, an amino-acetonitrile derivative, against gastrointestinal nematodes of sheep in three countries of southern latin america.the efficacy of the novel anthelmintic, monepantel (an amino-acetonitrile derivative), was investigated in sheep naturally infected with gastrointestinal nematodes in five studies in argentina, brazil, and uruguay. monepantel, administered at 2.5 mg/kg liveweight, was highly effective (>99.7%) against haemonchus contortus, teladorsagia (ostertagia) circumcincta, trichostrongylus axei, trichostrongylus colubriformis, cooperia curticei, cooperia mcmasteri, cooperia oncophora, cooperia pectinata, c ...200919789895
the prevalence of anthelmintic resistance in nematode parasites of sheep in southern latin america: argentina.sixty-five sheep farms in the northern provinces of buenos aires, entre rios, corrientes, cordoba and sante fe were used in this survey on anthelmintic resistance. anthelmintic groups tested were the benzimidazoles, levamisole, the combination levamisole + benzimidazole product and the avermectins. the overall level of resistance was 46% of properties, with resistance to the individual drug groups being 40%, 22%, 11% and 6%, respectively. on a large proportion of farms the resistance recorded wa ...19968686164
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