Eficácia anti-helmíntica da associação de abamectina com fluazuron no controle dos principais nematoides gastrintestinais de bovinos

ABSTRACT. Coelho C.N., Oliveira G.F., Coumendouros K., Moraes P.A., Medeiros M.T., Borges D.A., Nascimento C.G. do, Correia T.R. & Scott F.B. [Anthelmintic efficacy of abamectin with fluazuron association in control of the gastrointestinal nematodes of cattle.] Eficacia anti-helmintica da associacao de abamectina com fluazuron no controle dos principais nematoides gastrintestinais de bovinos. Revista Brasileira de Medicina Veterinaria, 37(Supl.1):100-105, 2015. Curso de Pos-Graduacao em Ciencias Veterinarias, Instituto de Veterinaria, Anexo 1, Universidade Federal Rural do Rio de Janeiro, Campus Seropedica, Ecologia, BR 465 Km 7, Seropedica, RJ 23897-970, Brasil. E-mail: scott.fabio@gmail.com The aim of the study was to evaluate the anthelmintic efficacy of 0.6% abamectin associated with 3.0% fluazuron used respectively at doses of 600mcg and 3mg/kg of body weight by “pour-on” route in cattle, for the control of gastrintestinais nematodes Haemonchus placei, Cooperia punctata, Cooperia pectinata, Oesophagostomum radiatum and Trichostrongylus axei. To this end, two studies were conducted, a controlled one with euthanasia and necropsy, the other one evaluating the decrease of eggs per gram of feces (EPG) at the field level. For anthelmintic efficacy of the controlled study, the test product showed anthelmintic efficacy results of 92.59% for H. placei; 97.62% for T. axei; 87.82% for C. punctata; 86.96% for C. pectinata and 96% for O. radiatum. In the test conducted at a field level (EPG), the product has experienced an 92.17% efficacy results for the day +7; 89.32% for the day +14; 87.38% for day +21. The combination of abamectin and fluazuron was effective in the control of artificial infection by H. placei, O. radiatum, T. axei; and moderately effective in controlling artificial infections C. pectinata and C. punctata. The product test also showed a reduction of eggs per gram of feces (EPG) in cattle naturally infected.