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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  • The relationship between the skin and some bacterial species occurring on it in the Merino 
    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 ...
  • Frequency and occurrence of Lactobacillus acidophilus in the gut of the pig, as indicated by its presence in the faeces 
    Von Aulock, Monika H.M.; Holzapfel, W.H.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Faecal samples of 2 pigs, kept on a constant diet, were analysed for Lactobacillus acidophilus and other lactic acid bacteria at 1 week intervals over a period of 3 months. Enumeration of L. acidophilus by selective methods ...
  • The incidence of Coxiella burnetii antibodies in cattle in the Transvaal 
    Gummow, Bruce; Poerstamper, N.; Herr, S.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    With the use of the complement fixation test, 8 900 cattle were tested for antibodies to Coxiella burnetli. These were randomly selected from 178 different farms in 37 districts in the Transvaal. The percentage of cattle ...
  • Purification of Cowdria ruminantium by density gradient centrifugation 
    Neitz, Albert Walter Herman; 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 ...
  • Some features of coagulase positive staphylococci from bovine milk. II. Comparison of conventional techniques and the API Staph system 
    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 ...
  • 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 ...
  • 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 ...
  • 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, ...
  • Purification of the alpha toxin of Clostridium perfringens type A by ultrafiltration and gel chromatography 
    Odendaal, M.W.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Clostridium perfringens type A toxin produced in Jayko & Lichstein medium was subjected to various concentration and purification procedures. The results obtained with 3 different ultrafiltration membranes followed by gel ...
  • The infection and treatment method of vaccination against heartwater 
    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 ...
  • The taxonomic status of the causative agent of heartwater 
    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 ...
  • The control of Parafilaria bovicola transmission in South Africa 
    Nevill, E.M.; Wilkins, C.A.; Zakrisson, G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    Ivermectin treatment of all cattle on a badly infected farm failed to interrupt the transmission of P. bovicola, even though ovipositional blood spots were drastically reduced in numbers for an entire summer season following ...
  • The identification of factors capable of reversing the core-mediated inhibition of the bluetongue virus transcriptase 
    Huismans, H. (Henk), 1942-; Van Dijk, A.A.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The in vitro transcription reaction of bluetongue virus (BTV) is characterized by a core-mediated, temperature-dependent inhibition at high core concentrations and temperatures (Van Dijk & Huismans, 1980; Huismans, Van ...
  • Some wild hosts of the Karoo paralysis tick, Ixodes rubicundus Neumann, 1904 (Acari : Ixodidae) 
    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 ...
  • Specific immunity in farm animals to heartwater 
    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 ...
  • Production of a macrophage chemotactic factor by cultured jaagsiekte tumour cells 
    Verwoerd, Daniel Wynand; Myer, M.S.; Garnett, H.M.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)
    The increase of alveolar macrophages in jaagsiekte sheep lungs is not caused by excessive surfactant production but is due to a chemotactic factor secreted by the tumour cells. This factor has a molecular mass in the region ...
  • The clinical pathology and pathophysiology of heartwater : a review 
    Guthrie, Alan John; 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 ...
  • 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. ...
  • 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, ...
  • The tick vectors of Cowdria ruminantium (Ixodoidea, Ixodidae, genus Amblyomma) and their distribution 
    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 ...