Browsing South African National Veterinary Repository by Author "Jansen, B.C."

Browsing South African National Veterinary Repository by Author "Jansen, B.C."

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  • The acquisition of immunity to Histophilus ovis by sheep in nature 
    Jansen, B.C.; Hayes, Marianna; Bigalke, R.D. (Pretoria : Government Printer, 1984)
    It was demonstrated that skin wound infection with Histophilus ovis elicits an immune response which can protect a ram against a challenge injection of the same organism into its epididymis.
  • The aetiology of ram epididymitis 
    Jansen, B.C.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Pretoria : Government Printer, 1980)
    A wide variety of organisms from the environment invade the preputial cavity of rams. Various of these organisms can be isolated from the deeper parts of the male genital tract, and especially from the accessory glands. ...
  • The antibody response of cattle to Clostridium botulinum types C and D toxoids 
    Jansen, B.C.; Knoetze, P.C.; Visser, F.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Pretoria : The Government Printer, 1976)
    The resistance of cattle with varying serum-antitoxin titres was determined by per os challenge. The results proved that a solid immunity can be produced against C. botulinum toxins C₁ and D. The immune response of cattle ...
  • The antigenicity of Clostridium botulinum type C toxin administered per os 
    Jansen, B.C.; Knoetze, P.C.; Visser, F.; South Africa. Dept. of Agricultural Technical Services; Tustin, R.C.; De Lange, M.; Reinecke, R.K.; Walker, Jane B.; De Kock, V.E. (Pretoria : Government Printer, 1970)
    Large quantities of toxoid given to rabbits per os did not elicit a primary immune response. Toxin absorbed through the intestinal wall of guinea-pigs and toxoided produced an anamnestic response on injection into ...
  • Babesia thomasi Sp. Nov., an intra-erythrocytic parasite of the Cape dassie [Procavia capensis (Pallas)] 
    Jansen, B.C.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Pretoria : Government Printer, 1952)
    (1) A new species of protozoan parasite in the Cape dassie is described for which the name Babesia thomasi is proposed. (2) This parasite is only slightly pathogenic for normal animals but fatal for splenectomised Cape ...
  • The beta toxin of Clostridium welchii Type B, Wilsdon, in relation to the production of a vaccine against lamb dysentery 
    Jansen, B.C.; Clark, R.; Louw, J.G.; De Kock, V.E.; Alexander, R.A. (Pretoria : The Government Printer, 1961)
    Evidence is provided to prove the specificity of the flocculation test used as a tool for assaying the beta fraction of Cl. welchii Type B toxin and its corresponding antitoxin. The separation from Cl. welchii Type B ...
  • A discussion on the classification of the Theileridae 
    Neitz, W.O.; Jansen, B.C.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Pretoria : The Government Printer, 1956)
    The morphological similarity between the members of the genera Theileria and Gonderia in domestic animals makes their differentiation extremely difficult. In making a differential diagnosis veterinarians and zoologists ...
  • The duration of immunity to pulpy kidney disease of sheep 
    Jansen, B.C.; Jansen, B.C. (Pretoria : The Government Printer, 1967)
    It was shown that the immunity induced by a primary and secondary dose of antigen varying from 25 to 135 Lf APT, protected sheep for only about nine weeks. Any booster dose given before a year after the primary injection ...
  • The epidemiology of bacterial infection of the genitalia in rams 
    Jansen, B.C.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1983)
    The interrelationship between the various bacteria isolated from the genital tract of rams and their host animals was studied. The pathogenicity of the different isolates varied. Several of these bacteria could be cultured ...
  • The experimental transmission of Theileria ovis by Rhipicephalus evertsi 
    Jansen, B.C.; Neitz, W.O.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1956)
    1. The transmission of Th. ovis by the two host tick Rh. evertsi was successful in six susceptible splenectomized sheep. 2. Th. ovis was picked up by the larvae and nymphae and transmitted by the ensuing adults. 3. ...
  • Heartwater in Angora goats. I. Immunity subsequent to artificial infection and treatment 
    Prozesky, Leon; Du Plessis, J.L.; Jansen, B.C.; Bigalke, R.D. (Pretoria : The Government Printer, 1983)
  • The immune response of horses to tetanus toxoid 
    Jansen, B.C.; Knoetze, P.C.; Steyn, P.J.J.; Bigalke, R.D.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B.; Cameron, Colin McKenzie; Gilchrist, Frances M.C. (Published by The Government Printer, Pretoria, 1979)
    An intramuscular injection of 8-16 Lf tetanus toxoid in water-in-oil emulsion protected adult horses against tetanus for at least 128 weeks. A booster dose of 8 Lf toxoid in aqueous solution protected them for a further ...
  • Immunity against genital infection by Histophilus-ovis in rams 
    Jansen, B.C.; Hayes, Marianna; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1984)
    Rams have been immunized against an infection of their genitalia by Histaphilus avis. An alum-precipitated antigen and an antigen plus Freund's complete adjuvant proved equally effective. An injection of live H. ovis into ...
  • The occurence of some hitherto undescribed Leucocytozoon and Haemoproteus species in South African birds 
    Jansen, B.C.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Pretoria : The Government Printer, 1952)
    The presence of Leucocytozoon in three and Haemoproteus in two members of the family Columbidae is recorded.
  • The occurrence of Eperythrozoon parvum Splitter, 1950 in South African swine 
    Jansen, B.C.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1952)
    (1) The presence of Eperythrozoon parvum in a splenectomised pig at Onderstepoort is recorded. (2) Preliminary studies on the transmission of this parasite suggest that Haematopinus suis may be a vector.
  • The parasiticidal effect of aureomycin (Lederle) on Babesia equi (Laveran 1899) in splenectomised donkeys 
    Jansen, B.C.; Alexander, R.A.; Clark, R.; Louw, J.G.; De Kock, V.E. (Published by The Government Printer, Pretoria, 1953)
    Veterinarians in countries where tick-borne diseases are prevalent are well acquainted with the difficulties encountered in the treatment of equine Babesiosis ( = Nuttaliosis). Affected animals do not respond satisfactorily ...
  • The pathology of bacterial infection of the genitalia in rams 
    Jansen, B.C.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Pretoria : The Government Printer, 1980)
    Details are given of the macroscopic and histopathological changes brought about by infection of the genitalia of rams by bacteria other than Brucella ovis. Lesions of the vesiculae seminales and ampullae are described ...
  • The production of a basic immunity against pulpy kidney disease 
    Jansen, B.C.; Jansen, B.C. (Pretoria : The Government Printer, 1967)
    A single dose of alum-precipitated epsilon toxoid (APT) produces only a transitory immunity when given to fully susceptible sheep. A maximal immunity response is brought about by two injections each containing 90 Lf toxoid. ...
  • The quantitative determination of the toxic factors produced by Clostridium botulinum (Van Ermengem, 1896) types C and D 
    Jansen, B.C.; South Africa. Dept. of Agricultural Technical Services; De Lange, M.; Reinecke, R.K.; Walker, Jane B.; De Kock, V.E.; Howell, P.G. (Pretoria : Government Printer, 1971)
    The Lf values of the C₁, C₂ and D factors produced by Clostridium botulinum types C and D were compared with the results of in vivo quantitative tests. It was found that the flocculation test is a reliable method of ...
  • The reaction of ovine neutrophils to Histophilus ovis in relation to genital infection of rams 
    Jansen, B.C.; Hayes, Marianna; Knoetze, P.C.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1983)
    Histophilus ovis was shown to be phagocytized by neutrophils when the organisms enter the lumen of the reproductive tract of the ram. The phagocytosis and destruction of H. ovis by neutrophils was demonstrated in vitro by ...