Van Wyk, Jan Aucamp; Malan, F.S.; Gerber, H.M.; Alves, Regina M.R.; Bigalke, R.D.
(Published by the Government Printer, Pretoria., 1987)
Two field strains of Haemonchus contortus, one from Pretoria on the Highveld and the other from White River in the Lowveld of the Transvaal, showed pronounced resistance to rafoxanide at a dosage rate of 7,5 mg/kg live ...