Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Title

Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Title

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  • The non-specific resistance of cattle to heartwater 
    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 ...
  • The occurrence of Schistosoma mattheei in the south-western Transvaal 
    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 ...
  • Ovine hepatogenous photosensitivity caused by the plant Nidorella foetida (Thunb.) DC. (Asteraceae) 
    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 ...
  • Parasites in sheep grazing on Kikuyu (Pennisetum clandestinum) pastures in the winter rainfall region 
    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, ...
  • Parasites of domestic and wild animals in South Africa. XXII. Ixodid ticks on domestic dogs and on wild carnivores 
    Horak, Ivan Gerard; Guillarmod, Amy Jacot; Moolman, L.C.; De Vos, Valerius; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Ixodid ticks were collected from 4 dogs on smallholdings near Grahamstown, eastern Cape Province, on 1 or more occasions each week for periods ranging from 9-36 months. Fourteen tick species were recovered and the seasonal ...
  • Parasites of South African Wildlife. I. Helminths of bushbuck, Tragelaphus scriptus, and grey duiker, Sylvicapra grimmia, from the Weza State Forest, Natal 
    Horak, Ivan Gerard; Boomker, Jacob; Keep, M.E.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Thirteen bushbuck, Tragelaphus scriptus, and 13 grey duikers, Sylvicapra grimmia, were culled in the Weza State Forest, Natal, from May 1983-May 1984. The maximum number of worms recovered from a single bushbuck was 393. ...
  • The pathogenesis of heartwater 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Du Plessis, J.L.; Malan, Letitia; Kowalski, Z.E.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Hypotheses on the pathogenesis of heartwater, which have been published so far, are briefly reviewed. Attempts were made at counteracting the effects of vaso-active substances released by mast cells by treating mice infected ...
  • Pathological findings in a natural outbreak of aflatoxicosis in dogs 
    Williams, Mark C.; Bastianello, Stella S.; Nesbit, J.W.; Lange, A. Lucia; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The gross and histopathological lesions of 10 cases in a natural outbreak of aflatoxicosis amongst dogs in the Republic of South Africa are reported. The 10 cases were classified as acute (1 case), subacute (7 cases) and ...
  • The pathology of heartwater. III. A review 
    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 ...
  • The persistence of colostral Anaplasma antibodies and incidence of in utero transmission of Anaplasma infections in calves under laboratory conditions 
    Potgieter, F.T.; Van Rensburg, L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Twenty-six calves, born from 25 Anaplasma-infected, intact and splenectomized cows, from a herd kept under strict tick-free laboratory conditions, were monitored for the presence of Anaplasma antibodies, using the rapid ...
  • A preliminary investigation into the efficacy of intraperitoneal vaccination of sheep and goat kids against heartwater 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Hurter, L.R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The intraperitoneal route was explored both as an alternative to the intravenous route for the vaccination of sheep and goat kids against heartwater and for the administration of an antibiotic to animals suffering from the ...
  • The present state of Cowdria ruminantium cultivation in cell lines 
    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 ...
  • Problems encountered in the control of heartwater in Angora goats 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Gruss, B.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This preliminary investigation confirmed that when Angora goats were immunized against heartwater, either when kids or young goats, they still had an immunity to heartwater a year later when they were challenged with a ...
  • Problems with the interpretation of epidemiological data in heartwater : a study on 23 farms 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Malan, Letitia; Du Plessis, J.L.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    In an epidemiological study undertaken on 23 farms where heartwater occurs endemically, it was found that on an overall average, antibodies to Cowdria ruminantium were detected in 64,3 % of the cattle, 6 adult Amblyomma ...
  • Production of a macrophage chemotactic factor by cultured jaagsiekte tumour cells 
    Verwoerd, Daniel Wynand; Myer, M.S.; Garnett, H.M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The increase of alveolar macrophages in jaagsiekte sheep lungs is not caused by excessive surfactant production but is due to a chemotactic factor secreted by the tumour cells. This factor has a molecular mass in the region ...
  • The production of heartwater vaccine 
    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 events leading to the production of an effective vaccine against heartwater are summarized. The production techniques used at Onderstepoort to produce and control the quality of the infected blood and nymph suspension ...
  • Purification of Cowdria ruminantium by density gradient centrifugation 
    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 ...
  • Purification of Cowdria ruminantium by immunoadsorbent affinity chromatography 
    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, ...
  • Purification of Cowdria ruminantium by lectin cellular affinity chromatography 
    Vermeulen, N.M.J.; Neitz, Albert Walter Herman; Viljoen, G.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This review covers the isolation of Cowdria ruminantium by lectin cellular affinity chromatography from different Amblyomma hebraeum sources. Cellular affinity chromatography has been reviewed with special attention being ...
  • Purification of the alpha toxin of Clostridium perfringens type A by ultrafiltration and gel chromatography 
    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 ...