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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  • Problems with the interpretation of epidemiological data in heartwater : a study on 23 farms 
    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 ...
  • 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, ...
  • 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 ...
  • 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 ...
  • Purification of Cowdria ruminantium by lectin cellular affinity chromatography 
    Vermeulen, N.M.J.; Neitz, Albert Walter Herman; 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 ...
  • The reservoir status of goats recovered from heartwater 
    Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Barre, N.; Camus, E.; Bigalke, R.D. (Pretoria : Government Printer, 1987)
    Experiments were conducted with Creole goats and Amblyomma variegatum ticks in Guadeloupe to investigate whether it is possible to transmit Cowdria ruminantium to susceptible hosts with nymphs fed in the larval stage on ...
  • Welcoming address to the workshop on heartwater: past, present and future 
    Van der Merwe, F.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
  • The development of Cowdria ruminantium in neutrophils 
    Logan, L.L.; Whyard, T.C.; Quintero, J.C.; Mebus, C.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The sequential development of C. ruminantium (Kwanyanga and Kumm isolates) was followed in caprine leukocyte cultures by light microscopy, direct immunofluorescent microscopy (DFA), indirect immunofluorescent microscopy ...
  • Cross-immunity between isolates of Cowdria ruminantium 
    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 ...
  • Pathological findings in a natural outbreak of aflatoxicosis in dogs 
    Williams, Mark C.; Bastianello, Stella S.; Nesbit, J.W.; Lange, A. Lucia; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The gross and histopathological lesions of 10 cases in a natural outbreak of aflatoxicosis amongst dogs in the Republic of South Africa are reported. The 10 cases were classified as acute (1 case), subacute (7 cases) and ...
  • 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 ...
  • The resistance spectrum shown by a fenvalerate-resistant strain of blue tick (Boophilus decoloratus) to a range of ixodicides 
    Coetzee, Bridgette B.; Stanford, G.D.; Davis, D.A.T.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    A strain of Boophilus decoloratus, resistant to fenvalerate, was subjected to larval immersion, adult immersion and stall tests using the following classes of ixodicides : organochlorines, organophosphates, a diamidide and ...
  • Broiler pulmonary hypertension syndrome. I. Increased right ventricular mass in broilers experimentally infected with Aegyptianella pullorum 
    Huchzermeyer, Fritz W.; Cilliers, J.A.; Diaz Lavigne, Celestina D.; Bartkowiak, R.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Infection with the obligatory intra-erythrocytic anaplasma-like rickettsia Aegyptianella pullorum in 4-week old broilers at a moderate altitude of 1 200 m produced a significant increase in the mean relative right ...
  • 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 ...
  • A preliminary investigation into the efficacy of intraperitoneal vaccination of sheep and goat kids against heartwater 
    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 ...
  • Rearing and infection techniques for Amblyomma species to be used in heartwater transmission experiments 
    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. ...
  • Cowdria ruminantium infection in the mouse : a review 
    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 ...
  • The serological relationship between Cowdria ruminantium and certain members of the genus Ehrlichia 
    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, ...
  • 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 ...
  • Resistance by the blue tick (Boophilus decoloratus) to the synthetic pyrethroid, fenvalerate 
    Coetzee, Bridgette B.; Stanford, G.D.; Davis, D.A.T.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The Shaw larval test, in conjunction with adult tick immersion and stall tests, was utilized to confirm that a field strain of B. decoloratus, from Natal, is highly resistant to the ixodicide fenvalerate (Factor of ...