A strain of Haemonchus contortus resistant to thiophanate.
The occurrence of a field strain of Haemonchus contortus resistant to thiophanate is reported for the first time in New Zealand. In a controlled anthelmintic trial with experimentally infected animals, thiophanate at 50-100 mg/kg had no appreciable effect on the Haemonchus burden. Albendazole reduced faecal strongylate egg counts by 95% in animals with naturally acquired 59 infections.
Pomroy
W E
WE
Department of Veterinary Pathology and Public Health, Massey University, Palmerston North.
Charleston
W A
WA
West
D M
DM