D. J. da Silva, E. A. Roverso, P. G. da Cunha e m. I. Montagnini.
Emprego de anti-helmintrico em bezerras, no controle de verminose, visando seu melhor desenvolvimento.
A aplicação de vermífugo em bezerras lactentes não melhorou o ganho de peso quando comparado a animais não vermifugados, Causas aleatórias como habilidade materna e produção leiteira das vacas influenciaram mais que o próprio tratamento helmintológico. Na contagem dos ovos por grama de fezes (OPG) verificou-se diferença significativa favorável ao lote tratado, porém o aumento ou diminuição de ovos de vermes nas fezes não alterou o eritrograma dos animais.
Use of anthelmintic in heifers to control verminosis, considering better development.
The aim of the trial was to study the antihelmintie influence on growth of grazing heifers. Thirty crossbred S. Gertrudis weaning heifers following theirs mothers were used under grazing conditions. For each group of 6 animals, except control group, was given vermifuge by oral or parenteral administration monthly or each other month from December 1972 to May 1973. Heifers age difference was two months and the first vermifuge administration was done after the first month of life and this procedure did not affected animals health. When number of parasites eggs per gramme of feces is bigger than 600, antihelmintic treatment must be done to control intestinal parasites effects. At the end of trial no statistical differences was found on heifers live weight gain mainly because to unknowing aleatory causes. The analysis of the number of specific eggs of various species of nematodes shown that anthelmintic treatments were equally efficient both according to via or interval of administration. Erythrogram was not influenced neither by the number of helminths nor by vermifuge application. No correlation was found between eggs by gramme on feces and the erythrogram.