ANTHELMINTIC RESISTANT NEMATODES IN GOATS IN THE NETHERLANDS

A suspected case of anthelmintic resistance on a farm with Angora and Anglo-Nubian goats was confirmed in a controlled test, Twelve lambs of sheep were infected with larvae cultured from faeces of the goats, Th e lambs were allocated to four groups: untreated controls and lambs tr eated 21 days after infection with 5 mg kg(-1) oxfendazole, 0.2 mg kg( -1) ivermectin or 7.5 mg kg(-1) levamisole, The lambs were slaughtered 1 week later and post-mortem worm counts were performed, Benzimidazol e resistance was found in Haemonchus contortus, Teladorsagia circumcin cta, Cooperia curticei and Trichostrongylus colubriformis with the eff icacy of oxfendazole being 68%, 31%, 21% and 48% respectively, No resi stance was found against levamisole or ivermectin.