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 ecology of the African vectors of heartwater, with particular reference to Amblyomma hebraeum and Amblyomma variegatum 
    Horak, Ivan Gerard; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Petney, T.N.; Rechav, Y.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    The hosts, sites of attachment, life cycle, habitat requirements and seasonal abundance of Amblyomma astrion, Amblyomma cohaerens, Amblyomma gemma, Amblyomma hebraeum, Amblyomma lepidum, Amblyomma marmoreum, Amblyomma ...
  • The effect of dipping on parasitic and free-living populations of Amblyomma hebraeum on a farm and on an adjacent nature reserve 
    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 ...
  • The efficacy of alternative routes for the infection or vaccination of animals with Cowdria ruminantium 
    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 ...
  • Enzyme electrophoresis of South African Schistosoma mattheei and S. haematobium 
    Kruger, F.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    As a pilot project of a study undertaken to determine the influence of S. mattheei X S. haematobium hybridization on various South African S. mattheei populations by means of biochemical-taxonomic methods, a comparative ...
  • Epidemiology of heartwater in Guadeloupe and in the Caribbean 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Camus, E.; Barre, N.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    At present, heartwater in the Caribbean is known with certainty only on Guadeloupe, Marie Galante and Antigua; the first 2 islands are widely infected. The most important factors responsible for particular aspects of ...
  • Experimental evidence that the active principle of the poisonous plant Thesium lineatum L.f. (Santalaceae) is a bufadienolide 
    Anderson, L.A.P.; Joubert, J.P.J.; Kellerman, T. Stephanus; Pienaar, Barendina J.; Schultz, R.A. (Rowena Anitra); Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The toxicity of Thesium lineatum is confirmed in sheep. A toxic crystalline bufadienolide, with the suggested trivial name thesiuside, has been isolated from it. This is the first cardiac glycoside to be isolated from ...
  • Frequency and occurrence of Lactobacillus acidophilus in the gut of the pig, as indicated by its presence in the faeces 
    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 ...
  • Further studies on the clinical pathology of sweating sickness in cattle 
    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 ...
  • Future prospects and goal setting regarding research on heartwater 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bigalke, R.D.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This article highlights the most important research goals identified during the workshop on "Heartwater: Past, Present and Future," which was held from 8-11 September 1986 in the Republic of South Africa. An attempt has ...
  • Genetic resistance of Guadeloupe native goats to heartwater 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Matheron, G.; Barre, N.; Camus, E.; Gogue, J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The resistance rate of different populations of the same breed of creole Guadeloupean goats to Cowdria ruiminatium infection varied greatly depending on the previous heartwater history of each population. After experimental ...
  • The genome of Anaplasma : DNA base composition and DNA/DNA hybridization 
    Ambrosio, R.E.; Potgieter, F.T.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The Tm value of DNA from Anaplasma centrale and Anaplasma marginale was found to be 87,1 °C and 89,3 °C, respectively. The G + C content, calculated from the Tm, was 45,1% for A. centrale and 48,5 % for A. marginale. ...
  • Heartwater in hosts other than domestic ruminants 
    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 serology : some problems with the interpretation of results 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Du Plessis, J.L.; Camus, E.; Oberem, P.T.; Malan, Letitia; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Antibodies in the sera of domestic ruminants that have been infected with Ehrlichia bovis and other ehrlichial agents cross-react with the Kümm strain of Cowdria ruminantium used in the indirect fluorescent antibody test ...
  • Heartwater. An overview of the clinical signs, susceptibility and differential diagnoses of the disease in domestic ruminants 
    Van de Pypekamp, H.E.; Prozesky, L.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    Heartwater is a frequently fatal tick-borne disease of ruminants caused by Cowdria ruminantium. In domestic ruminants the incubation period varies considerably and depends on the route of infection, virulence of the ...
  • Heartwater. The artificial transmission of Cowdria ruminantium in domestic ruminants and mice 
    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 artificial transmission of Cowdria ruminantium with infected blood, organ homogenates, peritoneal macrophages, tick stabilate and tissue culture cells is discussed. Organ homogenates prepared from the myocardium, spleen, ...
  • Heartwater: the development and life cycle of Cowdria ruminantium in the vertebrate host, ticks and cultured endothelial cells 
    Prozesky, L.; Du Plessis, J.L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Various aspects of the development and life cycle of Cowdria ruminantium are discussed. C. ruminantium is transmitted transstadially by certain Amblyomma species. Apparently organisms initially develop in the gut epithelial ...
  • Heartwater: the morphology of Cowdria ruminantium and its staining characteristic in the vertebrate host and in vitro 
    Prozesky, L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The morphology of Cowdria ruminantium is described and its staining characteristics in the vertebrate host and in vitro are summarized. Morphologically, the organisms are characterized in the cytoplasm of endothelial cells, ...
  • The historical background and global importance of heartwater 
    Bezuidenhout, J.D.; Provost, A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The first written record of what probably could have been heartwater originates from South Africa and dates back to 1838. Since then, the disease was described from almost all the African countries south of the Sahara ...
  • Identification of drugs effective against Cowdria ruminantium using a mouse screening system 
    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. ...
  • The identification of factors capable of reversing the core-mediated inhibition of the bluetongue virus transcriptase 
    Huismans, H. (Henk), 1942-; Van Dijk, A.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The in vitro transcription reaction of bluetongue virus (BTV) is characterized by a core-mediated, temperature-dependent inhibition at high core concentrations and temperatures (Van Dijk & Huismans, 1980; Huismans, Van ...