Efficacy of Some Commercial Formulations of Anthelmintics onHaemonchus contortusandTrichostrongylus columbianum

The anthelmintic action of five commercially formulated anthelmintics: Assiazine, Banminth, Nemafax, piperazine and levamisole has been evaluated by observing the effect on egg hatch, motility and mortality of the larvae of Trichostrongylus columbianum and Haemonchus contortus. Assiazine and levamisole inhibited egg-hatch of the helminth ova dose-dependently. Nemafax, Banminth, and piperazine did not inhibit egg hatch. Levamisole and Banminth affected the motility of the helminth larvae with subsequent death after 24h. The other anthelmintics used did not adversely affect the helminth larvae as compared with the untreated control group.