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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  • Van der Merwe, F.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
  • 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); 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 ...
  • Vermeulen, N.M.J.; Neitz, A.W.H.; 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 ...
  • 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); 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 ...
  • Scott, G.R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A fresh pragmatic classification of the rickettsias has been derived by applying the simplest techniques of numerical taxonomy. One order, the Rickettsiales, containing 3 families, the Rickettsiaceae, Phagosomaphilaceae, and ...
  • Ambrosio, R.E.; Du Plessis, J.L.; Bezuidenhout, J.D.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Genomic libraries of the Welgevonden and Kwanyanga isolates of Cowdria ruminantium have been constructed in an expression vector. These libraries contain approximately 4 x 10⁵ and 3 x 10⁵ recombinants respectively.
  • 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); 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 ...
  • Neitz, A.W.H.; 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 ...
  • Neitz, A.W.H.; 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); 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 ...
  • Jansen, B.C.; Hayes, M; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Ten bacterial species were isolated from areas on the skin of Merino sheep affected by a chronic scaly condition leading to retarded wool growth. The growth requirements of the bacteria were studied and it was shown that ...
  • Kleynhans, K.P.N.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The adults, puparium and 3rd instar larva of a dung-breeding fly, Musca nevilli sp. nov. are described in the subgenus Eumusca. The adults are characterized by 4 dark postsutural mesonotal vittae, 1-2 bristles dorsally on ...
  • Verster, Anna; Tustin, R.C.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A trial with 200 ewes and 127 lambs showed that vaccination of lambs with 2 doses of Oncosphere Secretory Antigen (OSA) 4 weeks apart, at either 4-8 and 8-12 weeks or at 12-16 and 16-20 weeks of age, was equally effective ...