Resultado da pesquisa (1)
Termo utilizado na pesquisa Susceptibilidade anti-helmíntica
#1 - Susceptibility of Haemonchus spp. in cattle to anthelmintic treatment with Albendazole and Oxfendazole
Abstract in English:
Sixteen holstein male calves, 6-10 months old, were allocated according to fecal egg counts to four treatments with four animals each and were treated as follows: Oxfendazole 2.5 mg/kg, Albendazole 5 mg/kg, Albendazole 7.5 mg/kg and undrenched controls. Seven days after treatment all animals were slaughtered for worm counting. The anthelmintic efficacy of the drugs were superior to 90% against Trichostrongylus axei, Ostertagia spp. and Cooperia spp. However, against Haemonchus the worm reduction was only 60% to Oxfendazole 2.5 mg/kg and 81% and 88% to Albendazole 5 and 7.5 mg/kg, respectively. The commercial suspensions used were found to have the concentrations indicated on the label and considering their low efficacies on Haemonchus it is concluded that this strain is partially resistant to these benzimidazoles.
Abstract in Portuguese:
Dezesseis bezerros machos da raça holandesa, com 6 a 10 meses de idade, foram distribuídos de acordo com as contagens de ovos nas fezes em quatro tratamentos compostos de quatro animais cada. Os animais foram submetidos aos seguintes tratamentos: Oxfendazole 2,5 mg/kg, Albendazole 5 mg/kg, Albendazole 7,5 mg/kg e lote controle. A eficácia anti-helmíntica dos produtos foi superior a 90% contra Trichostrongylus axei, Ostertagia spp. e Cooperia spp. Entretanto, contra Haemonchus a redução foi somente de 60% para o Oxfendazole 2,5 mg/kg e de 81% e 88% para o Albendazole a 5 e 7,5 mg/kg, respectivamente. Os produtos comerciais usados estavam na concentração indicada pelos fabricantes e a baixa eficácia em Haemonchus permite concluir que esta estirpe é parcialmente resistente àqueles benzimidazóis.
