Browsing South African National Veterinary Repository by Author "Haig, D.A."

Browsing South African National Veterinary Repository by Author "Haig, D.A."

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  • The attenuation of bluetongue virus by serial passage through fertile eggs 
    Alexander, R.A.; Haig, D.A.; Adelaar, T.F.; Du Toit, P.J. (Pretoria : The Government Printer, 1947)
    1. A strain of virus (University Farm strain) was adapted to propagation in the developing chick embryo by incubation of infected eggs containing 8 day embryos at 33.6°C. but not at 32.1°C., 35.0°C. or 38.2°C. 2. ...
  • Aureomycin in the treatment of heartwater 
    Weiss, K.E.; Haig, D.A.; Alexander, R.A.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    1. The value of aureomycin in the treatment of heartwater has been established. It is considerably more effective than the sulphonamides. 2. The minimal therapeutic dose for sheep appears to be 2•5 mg. per lb. administered ...
  • Canine distemper-immunization with avianised virus 
    Haig, D.A.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1956)
    1. In a brief review of the literature, methods which have been advocated for the immunisation of dogs against distemper and possible reasons for failures in immunity are discussed. 2. The propagation of Green's distemperoid ...
  • A case of swine erysipelas in the Union of South Africa 
    Haig, D.A.; Adelaar, T.F.; Du Toit, P.J. (Pretoria : The Government Printer, 1944)
    1. A case of swine erysipelas was encountered for the first time in South Africa. 2. A description of the post-mortem lesions is given. 3. The bacteriological and biological properties of the bacillus isolated in pure ...
  • The cytopathogenic action of bluetongue virus on tissue cultures and its application to the detection of antibodies in the serum of sheep 
    Haig, D.A.; McKercher, D.G.; Alexander, R.A.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1956)
    Cytopathogenic activity by egg adapted strains of bluetongue virus for sheep kidney cells in culture, and the neutralization of this activity by homologous antiserum are described. The possible applications of this ...
  • Fowl-pox vaccination in South Africa with egg-propagated fowl and pigeon-pox viruses 
    Haig, D.A.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)
    1. Fowl-pox as it occurs in the Union of South Africa is reviewed briefly together with relevant literature on the methods of immunization. 2. In South Africa until recently vaccine prepared from virus propagated on pigeons ...
  • Isolation in mice and embryonated hen's eggs of a virus associated with vaginitis of cattle 
    McIntosh, B.M.; Haig, D.A.; Alexander, R.A.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1954)
    From infected material obtained from various herds virus has been isolated in several instances in developing hen's eggs, and in one instance also in mice. The strain which could be propagated in both mice and eggs was ...
  • Preliminary note on the cultivation of Green's distemperoid virus in fertile hen eggs 
    Haig, D.A.; Du Toit, P.J. (Pretoria : The Government Printer, 1948)
    Green's distemper vaccine virus has been propagated 30 generations in developing hen eggs. Injections were made onto the chorio-allantoic membranes of eggs that had received a preliminary incubation of 8 days. Re-incubation ...
  • Transmission of the South African strain of dourine to laboratory animals 
    Haig, D.A.; Lund, A.S.; Du Toit, P.J. (Pretoria : The Government Printer, 1948)
    These results show that the South African strain of dourine like the chronic form of the disease in other countries is not readily transmitted to laboratory animals. But where the invasive power of the strain has ...
  • The use of egg attenuated bluetongue virus in the production of a polyvalent vaccine for sheep. A. Propagation of the virus in sheep 
    Alexander, R.A.; Haig, D.A.; Alexander, R.A.; Clark, R.; Sterne, M.; Louw, J.G.; Van der Reyden, D.; De Kock, V.E. (Published by The Government Printer, Pretoria, South Africa., 1951)
    (1) A brief description of Theiler's classical method of bluetongue vaccine production is given and various modifications introduced from time to time are recorded. (2) In an attempt to adapt the recognized technique ...
  • The use of tissue culture propagated bluetongue virus for complement fixation studies on sheep sera 
    Shone, D.K.; Haig, D.A.; McKercher, D.G.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1956)
    The development of a complement-fixation test possessing broad specificity, in which tissue culture propagated virus is used as antigen, for studies on bluetongue in sheep is described.
  • Wesselsbron virus - a virus not previously described, associated with abortion in domestic animals 
    Weiss, K.E.; Haig, D.A.; Alexander, R.A.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1956)
    1. There has been isolated from a lamb a pantropic virus with neurotropic properties and a well-marked affinity for embryonic tissue. 2. In the field the vectors are mosquitoes which have yet to be identified ...