Browsing 1973 Onderstepoort Journal of Veterinary Research, Volume 40, 1973 by Type "Article"

Browsing 1973 Onderstepoort Journal of Veterinary Research, Volume 40, 1973 by Type "Article"

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  • Worthington, R.W.; Mulders, M.S.G.; Van Rensburg, J.J.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Cameron, Colin McKenzie; Walker, Jane B.; Verster, Anna J.M. (Published by the Government Printer, Pretoria, 1973)
    Highly purified Cl. perfringens type D epsilon prototoxin was prepared by ammonium sulphate precipitation and DEAE cellulose chromatography of culture filtrate of cultures of Cl. perfringens type D (Strain ET 468). ...
  • Giesecke, W.H.; Van den Heever, L.W. (Louwrens Wepener), 1923-; Du Toit, I.J.; Beyer, Maria C. E.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    A critically comparative investigation was performed on 228 quarter samples from 26 Friesland-type dairy cows respectively to evaluate the diagnostic value of conventional direct and indirect cytological methods and a ...
  • Theodoridis, A.; Giesecke, W.H.; Du Toit, I.J.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Pretoria : The Government Printer, 1973)
    The effect of ephemeral fever (EF) on the lactation, pregnancy and fertility of 19 dairy cows was studied. During the febrile reaction milk yields were reduced by an average of 58,7 ± 22 %, depending on the stage of lactation ...
  • Lecatsas, G.; Erasmus, B.J.; Els, H.J.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    Electron microscopic studies carried out on thin sections of BHK 21 cells infected with equine encephalosis virus (EEV) have revealed a fine cytopathology closely resembling that shown by bluetongue and African horsesickness ...
  • Els, H.J.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    RNA fragments were released from bluetongue virus particles using the Kleinschmidt spreading technique. Electron microscopy of viruses in protein monolayers spread on urea showed that each virion liberated an average of ...
  • Worthington, R.W.; Mulders, M.S.G.; Van Rensburg, J.J.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Cameron, Colin McKenzie; Walker, Jane B.; Verster, Anna J.M. (Published by the Government Printer, Pretoria, 1973)
    Maximal activation of Clostridium perfringens epsilon toxin was only achieved by the combined action of trypsin and chymotrypsin. Impure preparations of trypsin, presumably containing small amounts of chymotrypsin were ...
  • Howell, P.G.; Young, E.; Hedger, R.S.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    A strain of SAT 2 foot-and-mouth disease virus which was experimentally inoculated into the epidermis of the tongues of captive African elephants produced vesicular lesions at the site of inoculation. After a short period ...
  • Boomker, Jacob Diederik Frederik; Baker, Maureen K.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    Helminth parasites recovered from the mountain reedbuck in the Loskop Dam Nature Reserve and the Mountain Zebra National Park are recorded. The following species are new host records: Moniezia expansa, Cooperia hungi, C. ...
  • Pienaar, J.G.; Kriek, N.P.J.; Naude, T.W.; Ellis, Shirley D.; Adelaar, T.F.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    Vermeersiekte in sheep, which is characterized clinically by vomition of ruminal contents, often accompanied by stiffness or paralysis, is caused by various plant species of the genus Geigeria. A histopathological study ...
  • Walker, Jane B.; Laurence, B.R.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    Descriptions are given of the male and female of Margaropus wileyi sp. nov. collected from the reticulated giraffe in Kenya. A key is given to the three species now known in the genus Margaropus and their differential ...
  • Lecatsas, G.; Poste, G.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
  • Huismans, H. (Henk), 1942-; Howell, P.G.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Pretoria : The Government Printer, 1973)
    Isolates of ³H-labelled messenger RNA of a number of different bluetongue virus serotypes were hybridized with saturating amounts of denatured ³²P-labelled double-stranded RNA of different serotypes. These cross-hybridization ...
  • Basson, P.A.; Kellerman, T. Stephanus; Naude, T.W.; Van Rensburg, I.B.J.; Welman, Wilhelmina G.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Pretoria : The Government Printer, 1973)
    Experimental evidence is presented to confirm field observations that Asaemia axillaris (Thunb.) Harv. ex Jackson and Lasiospermum bipinnatum (Thunb.) Druce cause ovine hepatogenous photosensitization. The two plants have ...
  • Worthington, R.W.; Mulders, M.S.G.; McFarlane, I.S.; Becker, D.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    Serum antibody titres were followed for a period of two years in 99 beef and 29 dairy cows which had been vaccinated as adults with B. abortus strain 19. Agglutination titres remained above diagnostic levels throughout but ...
  • McFarlane, I.S.; Worthington, R.W.; Mulders, M.S.G.; Becker, D.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    Rev 1 vaccination of sheep induced complement fixation titres to both Brucella abortus and Brucella ovis antigens, the complement fixing antibody titres were, however, higher with the B. abortus antigen. These titres ...
  • Van Wyk, J.A. (Jan Aucamp); De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    A modified eosin technique similar to that used for differential staining of live and dead spermatozoa stained dead cercariae of Schistosoma mattheei red while those that were alive remained colourless and transparent. Prior ...
  • Groeneveld, Hendrik T.; Van Wyk, J.A.; De Kock, V.E.; De Lange, M; Bigalke, R.D.; Cameron, Colin McKenzie; Walker, Jane B.; Verster, Anna J.M. (Published by the Government Printer, Pretoria, 1973)
    Various sampling methods for Schistosoma mattheei cercariae, including sampling from different concentrations, were tested. The most satisfactory method consisted of mixing the cercarial suspension by pouring it to and fro ...
  • Theodoridis, A.; Boshoff, S.E.T.; Botha, M.J.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Pretoria : The Government Printer, 1973)
    Bovine ephemeral fever virus of low passage level (5th to 8th) in tissue culture has proved to be more antigenic for cattle than higher passage level (17th to 19th) or mouse-brain-adapted virus. However, the neutralizing ...
  • Cameron, Colin McKenzie; Fuls, W.J.P.; De Kock, V.E.; De Lange, M.; Howell, P.G.; Bigalke, R.D.; Reinecke, R.K.; Walker, Jane B. (Pretoria : The Government Printer, 1973)
    Experiments were undertaken to enhance the immune response of mice, guinea pigs and sheep to C. pseudotuberculosis vaccine. The antibody response of guinea pigs was not increased either by the simultaneous administration ...
  • Wiese, I.H.; Basson, P.A.; Naude, T.W.; Maartens, B.P.; Basson, N.C.J.; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1973)
    Blesbuck (Damaliscus dorcas phillipsi) and springbuck (Antidorcas marsupialis) were found to be more susceptible to dieldrin and its photoisomer than any vertebrates reported on previously in the literature. In blesbuck ...