title: The effect of the control of endo- and ectoparasites on weight gains in crossbred cattle (Bos taurus taurus x Bos taurus indicus) in the central region of Brazil.
abstract: 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.
authors.affiliation: Embrapa - Centro Nacional de Pesquisa de Gado de Corte (CNPGC), Caixa Postal 154, CEP 79002-970, Campo Grande, Mato Grosso do Sul, Brazil. bianchin@cnpgc.embrapa.br
authors.forename: I
authors.initials: I
authors.lastname: Bianchin
authors.forename: B J
authors.initials: BJ
authors.lastname: Catto
authors.forename: N A
authors.initials: NA
authors.lastname: Kichel
authors.forename: A A R
authors.initials: AA
authors.lastname: Torres
authors.forename: M R
authors.initials: MR
authors.lastname: Honer
mesh_terms: D000818:Animals; D000871:Anthelmintics / Q000627:therapeutic use*; D001938:Brazil; D002417:Cattle / Q000235:genetics / Q000254:growth & development*; D002418:Cattle Diseases / Q000453:epidemiology* / Q000517:prevention & control; D003433:Crosses, Genetic; D004478:Ectoparasitic Infestations / Q000453:epidemiology* / Q000517:prevention & control; D005243:Feces / Q000469:parasitology; D005260:Female; D006374:Helminthiasis, Animal / Q000453:epidemiology* / Q000517:prevention & control; D007306:Insecticides / Q000627:therapeutic use*; D008297:Male; D010270:Parasite Egg Count / Q000662:veterinary; D012621:Seasons; D015430:Weight Gain
chemical_list: D000871:Anthelmintics; D007306:Insecticides