Bianchin I, Catto B J, Kichel N A, Torres A A R, Honer M R
Embrapa - Centro Nacional de Pesquisa de Gado de Corte (CNPGC), Caixa Postal 154, CEP 79002-970, Campo Grande, Mato Grosso do Sul, Brazil.
Trop Anim Health Prod. 2007 May;39(4):287-96. doi: 10.1007/s11250-007-9017-1.
Endo- and ectoparasite infections are among the most important causes of disease and production losses in beef cattle in tropical and subtropical regions. Nevertheless, most treatments are given without epidemiological information and without evaluating their effect on the development of the animals. In this work we present the results of a study of the effect of treatments against endo- and ectoparasites in crossbred steers, during three cycles of field trials in the Brazilian Cerrado region. Three anthelmintic treatments during the winter and three acaricidal treatments during the spring/summer provided significant additional weight gain in three and two experimental trials, respectively. In the trials, steers treated for gastrointestinal nematodes gained a mean of 33 kg more and those treated for ectoparasites had additional mean weight gains of 13 kg compared with non-treated steers.
体内和体外寄生虫感染是热带和亚热带地区肉牛疾病和生产损失的最重要原因之一。然而，大多数治疗都是在没有流行病学信息且未评估其对动物生长发育影响的情况下进行的。在这项研究中，我们展示了在巴西塞拉多地区进行的三个田间试验周期内，针对杂交阉牛体内和体外寄生虫的治疗效果研究结果。冬季的三种驱虫治疗和春/夏季的三种杀螨治疗分别在三个和两个试验中带来了显著的额外体重增加。在试验中，与未治疗的阉牛相比，接受胃肠道线虫治疗的阉牛平均体重增加了33公斤，接受体外寄生虫治疗的阉牛平均体重额外增加了13公斤。
