Resumen

MUNOZ, Jesús A et al. Anthelmintic Efficacy of Doramectin 1%, Ivermectin 1% and Ricobendazol 15% Against Gastrointestinal Nematodes in Hair Ovines.. Rev. Cient. (Maracaibo) [online]. 2008, vol.18, n.1, pp.12-16. ISSN 0798-2259.

In order to assess the anthelmintic efficacy of Doramectin 1%, Ivermectin 1% and Ricobendazole 15% in ovines, it was make a research with 49 animals crossbreed West African, naturally infected by gastrointestinal nematodes, which values previously to the assay were higher than 150 EPG. The animals were divided in four groups, three treated with the anthelmintics and one as untreated control. The fecal samples were taking directly of the rectum, previous to the treatment and at 7, 14, 21, 28, 35, 42 days post treatment (DPT), and they were analyzed through McMaster modified technique. To valuate the anthelmintic efficacy was used the eggs reduction percent method in vivo and the identification of the infective larvaes recovered from coprocultures. The Doramectin has high efficacy (94.2 - 100%) until the 35 DPT, it was observed infective larvaes of Trichostrongylus spp. at 35 and 42 DPT. The Ivermectina efficacy was high until the 28 DPT (90.37 - 100%), it was detected infective larvaes of Trichostrongylus, Haemonchus, Cooperia and Strongyloides, until 42 DPT. The Ricobendazole efficacy showed high variability during the assay (50 - 95%), suggesting anthelmintic resistance of the main recovered nematodes. Doramectin and Ivermectin showed the best nematodicide efficacy, being the one more persistent in the digestives nematodes control in hair ovines.

Palabras clave : Anthelmintic efficacy; gastrointestinal nematodes; ovines.