Resistance to ivermectin in a field strain of Ostertagia spp. in goats.
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.
Badger
S B
SB
Veterinary Services (Hawkes Bay) Ltd, P.O. Box 503, Waipukurau.
McKenna
P B
PB