Browsing 1990 Onderstepoort Journal of Veterinary Research, Volume 57, 1990 by Author "Van Wyk, Jan Aucamp"

Browsing 1990 Onderstepoort Journal of Veterinary Research, Volume 57, 1990 by Author "Van Wyk, Jan Aucamp"

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  • Cryopreservation of some common nematodes of ruminants for up to 11,3 years 
    Van Wyk, Jan Aucamp; Gerber, H.M.; Alves, Regina M.R.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)
    Infective larvae of selected batched of the following nematode species from sheep and cattle were examined for survival and infectivity (by injection into either the abomasum, the duodenum, or the jugular vein) after having ...
  • Evaluation of the efficacy of anthelmintics against parafilariosis in cattle 
    Groeneveld, Hendrik T.; Van Wyk, Jan Aucamp; Carmichael, I.H.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)
    Parafilariosis was first described in South Africa in 1964, thereafter being discovered at numerous localities in the country. When it became obvious that Parafilaria bovicola, for which no treatment was known, caused ...
  • A field strain of Trichostrongylus colubriformis resistant to levamisole and morantel in South Africa 
    Van Wyk, Jan Aucamp; Bath, Gareth F.; Gerber, H.M.; Alves, Regina M.R.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)
    A strain of Trichostrongylus colubriformis from Nottingham Road, in Natal, was found to be solidly resistant to levamisole and morantel at the recommended dose levels. Untreated control sheep in fact harboured fewer worms ...