Van Wyk, Jan Aucamp; Verwoerd, Daniel Wynand
(Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1999)
The infectivity for sheep of cryopreserved infective larvae (L3) of various strains of Haemonchus contortus, Trichostrongylus colubriformis and Trichostrongylus axei is compared using previously published results of trials ...