1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987

1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987

 

Recent Submissions

  • 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); Spickett, Arthur M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Socio-economic factors and environmental considerations have increasingly encouraged the search for methods of tick control other than acaricidal treatment. Biological control management regimes have, so far, not proved ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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); 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 ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Purnell, R.E.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    As a result of a personal survey in 1982, interviewing veterinarians from Louis Trichardt to Uitenhage, it was concluded that bovine heartwater is currently regarded as the most serious tick-borne disease problem in South ...
  • 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 ...
  • 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 critical evaluation is made of reports in the literature on the block method of vaccination and the relevant factors that play a role in the immunization against heartwater are also discussed. The most important of these ...
  • 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 ...
  • 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. ...
  • 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.
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Van der Merwe, Lente; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The history of vaccination techniques against heartwater and the development of the infection and treatment method are reviewed briefly. Present techniques and their shortcomings are defined and possible areas of improvement ...
  • 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. ...
  • Neitz, A.W.H. (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 ...
  • Neitz, A.W.H. (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 functional significance of some components of salivary glands and of their secretion and of haemolymph of Amblyomma hebraeum and other tick species is reviewed with respect to host responses at the attachment site, the ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Gothe, R.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    According to their activity profiles tick pheromones can be characterized as assembly pheromones, aggregation/attachment pheromones, pre-attachment or pre-feeding pheromones, attractant sex pheromones, contact sex pheromones, ...
  • 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 ...

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