| comparative efficacies of ivermectin, febantel, fenbendazole, and mebendazole against helminth parasites of gray foxes. | anthelmintic efficacies of ivermectin, febantel, fenbendazole, and mebendazole were compared in 45 adult gray foxes (urocyon cinereoargenteus) naturally infected with helminth parasites. fecal specimens were examined one week before treatment and one week and 3 weeks after treatment with each anthelmintic, using a sucrose flotation technique. compared with pretreatment, fewer foxes in all groups were infected with helminths one week and 3 weeks after treatment. ivermectin, febantel, and fenbenda ... | 1986 | 3505933 |