The barber pole worm (Haemonchus contortus) is a gastrointestinal roundworm that is one of the most significant parasites affecting goats, sheep, alpacas and llamas. H. contortus drinks blood from the animal, leading to anemia and eventually death.
Control of H. contortus has relied largely on the use of a limited number of anthelmintics. However, resistance to many of these these anthelmintics is now widespread and alternate methods of control have been recently explored.
