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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  • 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 ...
  • Nevill, E.M.; Wilkins, C.A.; Zakrisson, G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Ivermectin treatment of all cattle on a badly infected farm failed to interrupt the transmission of P. bovicola, even though ovipositional blood spots were drastically reduced in numbers for an entire summer season following ...
  • Durand, Anette M.; Barnard, Marie-Luise; Swanepoel, Martha L.; Engelbrecht, Marie M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Resistance to 20 antibiotics of 128 Salmonella and 97 Escherichia coli isolates from various registrable farm feeds was determined. A high frequency of comparatively low levels of resistance was found in both the Salmonella ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Oberem, P.T.; Bezuidenhout, J. Dürr; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The importance of further research on the susceptibility of wild hosts to Cowdria ruminantium infection is discussed. The literature is surveyed and an attempt is made to divide the various species described into susceptible ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Heyne, Heloise; Elliott, E.G.R.; Bezuidenhout, J. Dürr; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Techniques for the rearing of Amblyomma species to be used in heartwater (Cowdria ruminantium) transmission experiments are discussed. These involve the breeding and maintenance of infected and noninfected strains of ticks. ...
  • Van Amstel, S.R.; Oberem, P.T.; Matthee, O.; Reyers, Fred; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Experimentally-induced cases of sweating sickness in calves were used in an effort to correlate the blood chemistry with some of the known pathological changes. Results showed that the "sweating" associated with necrotic ...
  • Odendaal, M.W.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Clostridium perfringens type A toxin produced in Jayko & Lichstein medium was subjected to various concentration and purification procedures. The results obtained with 3 different ultrafiltration membranes followed by gel ...
  • Soll, M.D.; Carmichael, I.H.; Gross, Sheila J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The efficacy of ivermectin, administered in a sustained release formulation by intraruminal pumps at approximate daily dose rates of 20, 40 and 60 µg/kg, was evaluated in 16 cattle against induced infestations of 3 strains ...
  • Neser, J.A.; Kotze, C.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Increased bleeding time, impaired blood clot retraction and decreased thrombocyte aggregation were observed in pigs infected with virulent haemadsorbing and non-haemadsorbing African swine fever virus isolates. These ...
  • Reinecke, R.K.; Kirkpatrick, R.; Swart, Lydia; Kriel, Anna M.D.; Frank, F.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Regular worm counts were done post-mortem on sheep that had grazed on Kikuyu pastures at the Elsenburg Research Station near Stellenbosch, a winter rainfall region. Major species were Trichostrongylus colubriformis, ...
  • 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 ...
  • Schneider, D.J.; Green, Jennifer R.; Collett, M.G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Following a field outbreak of hepatogenous photosensitivity in sheep, an identical condition was reproduced experimentally by dosing 2 sheep with green, homogenized, Nidorella foetida material, collected from the camp where ...
  • Cameron, Colin McKenzie; Barnard, B.J.H.; Erasmus, Erna; Botha, W.J.S.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A stable oil emulsion rabies vaccine with a low viscosity was composed by a formula previously employed for Newcastle disease vaccine. Cattle developed high and sustained antibody levels, and guinea pigs were found to ...
  • 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 ...
  • Williams, J.C.; Vodkin, M.H.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Chlamydial and rickettsial diseases pose a hazard to man and to domesticated and wild animals. The virulence mechanisms which aid the establishment of these obligate intracellular parasites in the eukaryotic host are ...
  • Bezuidenhout, J.D.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Attempts were made to grow 4 isolates of Cowdria ruminantium in cell lines. Three of these isolates, viz. Ball 3, Welgevonden and Kwanyanga, could be cultivated in a calf endothelial cell line, but experiments with the ...
  • 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 ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Schroder, J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This paper reviews available literature on the efficacy of acaricides against Amblyomma hebraeum and other tick species, and presents information on tests done with registered chemicals in the laboratory. Little published ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bezuidenhout, J. Dürr; Bigalke, R.D.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Two main methods are currently being used by farmers in the heartwater regions to control this disease in cattle and other stock, namely strategic control of ticks and total control of ticks. Some farmers make successful ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Hamel, H.D.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Efficacy trials with flumethrin 1% pour-on were conducted in 9 different areas in 3 southern and central African countries against Amblyomma hebraeum and A. variegatum on cattle. A dose volume of 10 ml/100 kg body mass ...