Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Issue Date

Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Issue Date

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  • Neitz, Albert Walter Herman; Vermeulen, N.M.J.; Viljoen, G.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The isolation of Cowdria ruminantium by differential and isopycnic density gradient centrifugation is reviewed with special reference to the suitability of Percoll as density gradient medium. Infected sheep brain, Amblyomma ...
  • Gummow, Bruce; Poerstamper, N.; Herr, S.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    With the use of the complement fixation test, 8 900 cattle were tested for antibodies to Coxiella burnetli. These were randomly selected from 178 different farms in 37 districts in the Transvaal. The percentage of cattle ...
  • Erasmus, J.A.; Brand, P.A.J.; Galbraith, Marion M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A total of 150 isolates of Staphylococcus aureus were subjected to the tests on the API Staph system. Of these, 50 were also tested by conventional methods, using the same tests as those found on the API Staph strips. Applying ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Stewart, C.G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Mice develop a specific immune response following infection with the mice strains of heartwater. In the case of the Kümm strain the agent can persist in some tissues for up to 365 days. Transfer of spleen cells from immune ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Van Amstel, S.R.; Oberem, P.T.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This paper reviews the available literature on the treatment of heartwater and draws comparisons with results obtained from recent work on experimentally-induced heartwater in sheep, calves and mice.
  • Verschoor, J.A. (Jan Adrianus), 1953-; Bornman, L.; Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Certain species of Geigeria contain sesquiterpene lactones which cause vomiting disease in sheep. Dihydrogriesenin (DHG), a sesquiterpene lactone from G. aspera, contains an α-methylene function which can spontaneously ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bezuidenhout, J. Dürr; Olivier, J.A.; Gruss, B.; Badenhorst, J.V.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The efficacy of subcutaneous, intramuscular and intraperitoneal inoculation of heartwater infective blood or nymph suspensions was tested in 5 experiments involving a total of 199 sheep. The success rate of subcutaneous ...
  • Horak, Ivan Gerard; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Petney, T.N.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    Domestic stock on a farm 30 km north of Grahamstown were treated with an acaricide at regular intervals over a period of several years. This resulted in a marked reduction in all stages of development of Amblyomma hebraeum ...
  • Hunter, Pamela; Van der Vyver, F.H.; Henton, Marijke M.; Herr, S.; De Lange, J.F.; Selmer-Olsen, Anne; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The incidence of isolation of Leptospira sp. from the kidneys of slaughter pigs with “white-spot" macroscopic lesions was determined. Histology and general bacteriology were performed. Leptospira pomona was isolated from ...
  • Nevill, E.M.; Sutherland, B.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Thriving, permanent colonies of Musca xanthomelas and later of Musca nevilli were successfully established. However, because of the low reproduction potential of Musca lusoria a small colony only was kept for a limited ...
  • Von Aulock, Monika H.M.; Holzapfel, W.H.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Faecal samples of 2 pigs, kept on a constant diet, were analysed for Lactobacillus acidophilus and other lactic acid bacteria at 1 week intervals over a period of 3 months. Enumeration of L. acidophilus by selective methods ...
  • Neitz, Albert Walter Herman; Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Immunoselective methods with special reference to immunoadsorbent affinity chromatography as a means for the isolation of Cowdria ruminantium are reviewed. Attention is given to the source of the organism, immunization, ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Du Plessis, J.L.; Malan, Letitia; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A distinction is drawn between the non-specific resistance to heartwater of very young calves and that of cattle older than a year. The suckling-calf resistance is at its greatest during the first few weeks after birth and ...
  • Neitz, Albert Walter Herman; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The isolation, characterization and kinetic properties of a toxic and non-toxic anti-protease from the eggs of A. hebraeum are compared with similar data obtained for eggs of other tick species. The biochemistry of various ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); McHardy, N.; MacKenzie, P.K.I.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Heartwater is a tick-transmitted rickettsial infection of ruminants, caused by Cowdria ruminantium. The tetracyclines are the only compounds available for therapy of the disease. A screen, using mice infected with C. ...
  • Potgieter, F.T.; Van Rensburg, L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Anaplasma centrale was isolated from a field collection of Rhipicephalus simus. Transstadial transmission of A. centrale with adult ticks was demonstrated, but the infection was not carried transovarially. Ticks from this ...
  • Prozesky, Leon; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The pathological changes in cattle, sheep, goats, mice and various game species infected with Cowdria ruminantium are summarized. Macroscopical lesions in most animals include effusion of body cavities, oedema of the lungs ...
  • Williams, R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A single dilution enzyme-linked immunosorbent assay (ELISA), utilizing a reference serum with a known, predetermined end-titre was used to compute antibody titres of serum samples against African horsesickness virus. ...
  • Pieterson, P.M.; Te Brugge, Lesley A.; Herr, S.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Sensitivity discs containing 1 and 2 mg meso-erythritol were found to give comparable results to the use of meso-erythritol incorporated into growth medium at 1 and 2 mg/ml. The discs proved easy and efficient when used ...
  • Joubert, P.H.; Hamilton-Attwell, V.L.; Kruger, F.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    To determine whether Schistosoma mattheei is present in the south-western Transvaal, sixty habitats were searched for the intermediate host snail, Bulinus africanus. Ten populations of this snail were located, 2 of which ...