The efficacy of oxfendazole administered as a bolus compared with a drench formulation

In a flock of 40 ewe lambs of the Texel breed the anthelmintic oxfendazole was tested in two different formulations, a 2.265 per cent suspension and a 4 gram bolus containing 151 mg active ingredient. All treatments were based on a dose rate of 5 mg/kg body weight. Faecal examinations and larval differentiations were carried out on the day of treatment and two and seven days later. No differences in efficacy were apparent between the two treated groups. Oxfendazole in either formulation was 100 per cent effective in removing the major strongylids and trichostrongylids. A lower activity was seen against Strongyloides papillosus.