Efficacy of ivermectin against anthelmintic resistant isolates of sheep nematode parasites

Multiple anthelmintic resistance in a field strain ofHaemonchus Contortus in goats

“…Closantel and ivermectin proved to be very effective against this strain of H. contortus, as was reported earlier (Hall et al, 1981;Santiago et al, 1986). Since these drugs had not been used on the farm, resistance against them was not expected.…”