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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  • Braack, L.E.O.; De Vos, Valerius; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Monthly population fluctuations of carrion-frequenting blow-flies over a 24-month period were monitored using 2 carrion-baited traps in the southern Kruger National Park (KNP) and 3 in the northern KNP. All species displayed ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Holland, C.J.; Logan, L.L.; Mebus, C.A.; Ristic, M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Although Cowdria ruminantium has been classified within the tribe Ehrlichia of the family Rickettsiaceae, there has been no extensive study conducted regarding its antigenic relationship to members of the genus Ehrlichia, ...
  • Williams, R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A single dilution enzyme-linked immunosorbent assay (ELISA), utilizing a reference serum with a known, predetermined end-titre was used to compute antibody titres of serum samples against African horsesickness virus. ...
  • Horak, Ivan Gerard; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); MacIvor, K.M. de F.; Petney, T.N.; De Vos, Valerius; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Large numbers of birds, wild mammals and domestic stock from a variety of localities within the Republic of South Africa were examined for infestation with the ixodid ticks Amblyomma hebraeum and Amblyomma marmoreum. Every ...
  • 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 ...
  • Horak, Ivan Gerard; Moolman, L.C.; Fourie, L.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A variety of mammal and bird species in the Mountain Zebra National Park, eastern Cape Province, were examined for Ixodes rubicundus. In addition, caracal (Felis caracal) from the park and its vicinity as well as from the ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Stewart, C.G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The duration of immunity to heartwater normally varies from 6 months to 4 years. In Angora goats it may be difficult to produce a specific immune response with vaccination. Humoral immunity does not appear to play a role ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Stewart, C.G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Mice develop a specific immune response following infection with the mice strains of heartwater. In the case of the Kümm strain the agent can persist in some tissues for up to 365 days. Transfer of spleen cells from immune ...
  • Krecek, R.C.; Reinecke, R.K.; Malan, F.S.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Nine Burchell's and 6 Hartmann's mountain zebras were culled during the 3 climatic periods characteristic of the Etosha National Park, South West Africa/Namibia, and were examined for helminths. The Burchell's zebras ranged ...
  • Anonymous; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    No abstract available
  • 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 ...
  • Neitz, A.W.H. (Albert Walter Herman); Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Viljoen, Gerrit Johannes; Vermeulen, N.M.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Numerous parameters affect the enzyme-linked immunosorbent assay activity and the assay conditions must therefore be carefully controlled to obtain reproducible results. These parameters include temperature, pH, ionic ...
  • 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, ...
  • 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 ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Walker, Jane B.; Olwage, A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Twelve species of Amblyomma are presently known to be capable of transmitting Cowdria ruminantium. Of these A. variegatum is the most important and widely distributed vector in Africa. It has also extended its range ...
  • De Waal, D.T.; Potgieter, F.T.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Rhipicephalus evertsi evertsi larvae were fed on the ears of rabbits. Seven days after larval infestation, unfed, newly moulted nymphae were manually removed to infest a splenectomized donkey showing a patent Babesia ...
  • 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.
  • Van Wyk, J.A. (Jan Aucamp); Malan, F.S.; Gerber, H.M.; Alves, Regina M.R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Two field strains of Haemonchus contortus, one from Pretoria on the Highveld and the other from White River in the Lowveld of the Transvaal, showed pronounced resistance to rafoxanide at a dosage rate of 7,5 mg/kg live ...
  • Kocan, Katherine M.; Bezuidenhout, J. Dürr; Hart, Alet; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    Colonies of Cowdria ruminantium were studied in midgut epithelial cells and salivary gland acini of nymphal Amblyomma hebraeum that were infected experimentally as larvae. Colonies were found in both tissues and studied ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Van Amstel, S.R.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Both electro-encephalography and brain biopsy were examined as possible aids in the confirmation of a clinical diagnosis of heartwater in field cases. Results showed that electro-encephalographic changes associated with ...