Anthelmintic Evaluation of Aqueous Extract of Vernonia anthelmintica (L.) Willd Against Haemonchus contortus of Sheep and Goats

摘要

The study evaluated the adulticide anthelmintic activity of aqueous extract of seeds of Vernonia anthelmintica (L.) Willd based on in vitro trials against Haemonchus contortus worms of sheep and goats origin. The extract showed good activity with concentration of 500 mg mL~(-1) as early as after 1 hr and delayed activity after 6 h with 100 mg mL~(-1) concentration. The parasites were very sluggish and movement was very little at 2 h post-exposure and extremely sluggish with negligible movement at 6 hpost-exposure of 100 mg mL~(-1) concentration. The movement was little at 6 h post-exposure at concentration of 50 mg mL~(-1) but, the concentrations below 100 mg mL~(-1) failed to produce adulticide effect.