Browsing 1989 Onderstepoort Journal of Veterinary Research, Volume 56, 1989 by UP Author "Van Wyk, Jan Aucamp"

Now showing items 1-2 of 2

The problem of escalating resistance of Haemonchus contortus to the modern anthelmintics in South Africa

Van Wyk, Jan Aucamp; Malan, F.S.; Gerber, H.M.; Alves, Regina M.R.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1989)

During the past decade in South Africa there has been a continual increase in sheep of strains of gastrointestinal helminths resistant to the modern anthelmintics. Five strains of Haemonchus contortus are described in this ...
South African field strains of Haemonchus contortus resistant to the levamisole/morantel group of anthelmintics

Van Wyk, Jan Aucamp; Van Schalkwyk, Louwrens; Van Schalkwyk, P.C.; Visser, Evelyn L.; Alves, Regina M.R.; Gerber, H.M.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1989)

A strain of Haemonchus contortus from the Pietermaritzburg district of Natal was found to be resistant to levamisole (geometric mean efficacy 76,5 %), morantel (41,9 %), the benzimidazoles (oxfendazole: 33,7 %) and rafoxanide ...

Now showing items 1-2 of 2

Search UPSpace