Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Subject "Heartwater -- South Africa"

Browsing 1987 Onderstepoort Journal of Veterinary Research, Volume 54, 1987 by Subject "Heartwater -- South Africa"

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  • 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)
    The preparation of the antigen, details of the reagents, the titration of the antispecies conjugates and the execution of the indirect fluorescent antibody test are described. The sensitivity and specificity of the test ...
  • 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 ...
  • Guthrie, Alan John; Bertschinger, H.J. (Hendrik Jan); Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Van Amstel, S.R.; Reyers, Fred; Oberem, P.T.; Killeen, Valerie M.; Matthee, O.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    This paper reviews the available literature on the clinical pathology and pathophysiology of heartwater and makes comparisons with unpublished results obtained from a recent study in experimentally-induced heartwater in ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); MacKenzie, P.K.I.; McHardy, N.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The current knowledge of the pathogenicity, clinical signs and mortality of artificial infections by syringe inoculation of Cowdria ruminantium in laboratory and wild strains of mice is reviewed. It is concluded that a ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Logan, L.L.; Birnie, E.F.; Mebus, C.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Cross-immunity studies in goats and mice using 4 isolates of Cowdria ruminantium, 2 from the Republic of South Africa (Kwanyanga and Kümm), 1 from the Republic of Mali (Mali 1), and 1 from Guadeloupe (Garde1), demonstrated ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Barre, N.; Uilenberg, Gerrit; Morel, P.C.; Camus, E.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The existence of heartwater on 3 islands of the Central Lesser Antilles and the presence of an efficient vector originating from Africa, Amblyomma variegatum, on most of the islands of this region constitute a serious ...
  • Prozesky, Leon; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Criteria that are required to confirm heartwater in ruminants and mice are discussed. In ruminants it entails the microscopical and macroscopical lesions as well as the identification of Cowdria ruminantium in brain smears ...
  • Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Camus, E.; Barre, N.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A presumptive diagnosis of heartwater in the living animal can be based on clinical and epidemiologic observations. In Guadeloupe, heartwater can be confused with haemonchosis in goats or cerebral babesiosis in cattle. ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 : 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 ...
  • 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 : 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 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); Bezuidenhout, J. Dürr; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Heartwater has been transmitted experimentally by 12 Amblyomma species. Their importance depends on the extent of their distribution, adaptation to domestic stock and their efficacy as vectors. Except for one report of ...
  • 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 ...
  • 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 ...