| persistent efficacy of doramectin injectable against artificially induced infections with cooperia punctata and dictyocaulus viviparus in cattle. | three studies were conducted to evaluate the persistent efficacy of doramectin injectable solution against experimental challenges with infective larvae of cooperia punctata and dictyocaulus viviparus. in each study, four groups of ten randomly-assigned calves, negative for trichostrongyle-type eggs on fecal examination, were treated subcutaneously in the midline of the neck with saline (1 ml/50 kg) on day 0 or doramectin (200 microg/kg = 1 ml/50 kg) on day 0, 7, or 14. two additional calves fro ... | 1999 | 10392767 |