1. destroying parasites. 2. an agent that destroys parasites.
a. agent — includes insecticides, acaricides and anthelmintics. Their suitability depends on their efficiency in reducing parasite loads, especially of the immature forms, the breadth of their therapeutic spectrum, safety, their ease of administration, cost and freedom from tissue residue problems and the development of resistance.
systemic a. — the medication is administered orally or by injection and exerts its effect when the target parasite sucks blood or other body fluids or is in contact with the agent in the gut lumen.
topical a. — medication applied directly to the skin.