Efficacy of thiophanate and thiabendazole against inhibited trichostrongylid larvae in sheep.

In a trial with natural infections of trichostrongyles in sheep, thiophanate and thiabendazole at 100 mg/kg and 200 mg/kg bodyweight were highly effective in removing all stages of development of the helminths including the inhibited stages. At 50 mg/kg bodyweight however, both drugs were only capable of reducing helminth load.