title: Resistance to ivermectin in a field strain of Ostertagia spp. in goats.
abstract: The occurrence of a field strain of Ostertagia spp. showing a resistance to ivermectin in Angora goats is reported. In a controlled anthelmintic trial using naturally-infected goats, ivermectin at a dose rate of 0.2 mg/kg demonstrated an efficacy of 87% against this strain.
authors: Veterinary Services (Hawkes Bay) Ltd, P.O. Box 503, Waipukurau.
authors: S B
authors: SB
authors: Badger
authors: P B
authors: PB
authors: McKenna