EFFICACY OF MOXIDECTIN POUR-ON AGAINST NEMATODE INFECTIONS IN CATTLE

Three groups of eight calves, naturally infected with gastrointestinal nematodes acid artificially infected with Dictyocaulus viviparus were used to evaluate the efficacy of moxidectin pour-on at dose rates of 0.35 mg/kg and 0.5 mg/kg bodyweight. With both doses the efficacy was 100 per cent against adult D viviparus, Trichostrongylus axei, Osterta gia species and Nematodirus helvetianus. It was more than 99 per cent against Ostertagia and Nematodirus species fourth stage larvae, A smal l number of Cooperia species were found after treatment, and for this parasite, the efficacy of moxidectin ranged from 97.6 per cent against the larval stages to 98.8 per cent against the adults. No adverse rea ctions to the moxidectin treatment were observed.