Browsing 1971 Onderstepoort Journal of Veterinary Research, Volume 38, 1971 by Issue Date

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Browsing 1971 Onderstepoort Journal of Veterinary Research, Volume 38, 1971 by Issue Date

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  • Tryptic activation of Clostridium botulinum type Cᵦ toxin 
    Jansen, B.C.; Knoetze, P.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 toxicity of factor C₂ produced by C. botulinum type C ᵦ is increased by exposure to 0,1% trypsin at pH 7,5 for 30 minutes. If the tryptic action is allowed to continue at pH 7,5 at room temperature, destruction of ...
  • Preliminary report on the golden hamster as a definitive host of Taenia solium Linnaeus, 1758 and Taenia saginata Goeze, 1782 
    Verster, Anna; 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)
    Injections of an immunosuppressant drug, methyl prednisolone acetate, increase the susceptibility of golden hamsters to the adult stage of Taenia solium Linnaeus, 1758. At dosage rates of 10, 5, 2 and 1 mg per week, ...
  • Studies on Dictyocaulus filaria. I. Modifications of laboratory procedures 
    Anderson, P.J.S.; Verster, Anna; 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)
    Techniques used in a study of the life-cycle of Dictyocaulus filaria (Rudolphi, 1809) are described. First stage larvae migrate from faecal pellets placed in water. Infective larvae are cultured in clean water at room ...
  • Herpes nodules in the lung of the African elephant, Loxodonta africana (Blumenbach, 1797) 
    McCully, R.M.; Basson, P.A.; Pienaar, J.G.; Erasmus, B.J.; Young, E.; 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)
    Lymphoid nodules associated with Cowdry Type A intranuclear inclusions in epithelial and syncytial cells were found in the lungs of 74% of 50 African elephants in the Kruger National Park. Subsequent studies proved ...
  • 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 ...
  • Laboratory investigations on the life-cycle of the Karoo paralysis tick (Ixodes rubicundus Neumann, 1904) 
    Neitz, W.O.; Boughton, F.; Walters, H.S.; 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)
    Detailed data on the rearing of three groups of Ixodes rubicundus ticks at different temperature and humidity levels are presented in a series of tables and figures. The differences between the life-spans are seen to be ...
  • Nasal acariasis in the chacma baboon, Papio ursinus Kerr, 1972 
    McConnell, E.E.; Basson, P.A.; De Vos, Valerius; 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)
    Mature specimens of Rhinophaga papionis Fain, 1955 were observed exclusively in the maxillary recesses of 29 of 31 chacma baboons (93,6%). They stimulated the formation of inflammatory polyps, which in some cases almost ...
  • Studies on Dictyocaulus filaria. III. The migration of the immature stages applied to an anthelmintic test 
    Reinecke, R.K.; Collins, H. Maria; Anderson, P.J.S.; 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 larvae of Dictyocaulus filaria (Rudolphi, 1809) develop to the 5th stage in the mesenteric lymph nodes within 6 to 8 days of infestation. The migration of the 5th stage to the lungs commences on the 7th or 8th day ...
  • Mechanism of immunity to Corynebacterium pseudotuberculosis (Buchanan, 1911) in mice using inactivated vaccine 
    Cameron, Colin McKenzie; Engelbrecht, Maria M.; 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)
    Mice can be passively protected against infection with Corynebacterium pseudotuberculosis with hyperimmune rabbit serum prepared against whole bacterial cells. The mechanism of immunity depends on the inhibition of ...
  • Studies on South African cardiac glycosides. I. Isolation of toxic principles of Homeria glauca (W. & E.) N.E. Br. and observations on their chemical and pharmacological properties 
    Naude, T.W.; Potgieter, D.J.J.; 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 main toxic principle (1α, 2α-epoxyscillirosidin, a new bufadienolide cardiac aglycone) was isolated by very mild isolation techniques constantly correlated with semi-quantitative toxicity determinations in ...
  • The pathological physiology of Gaigeria pachyscelis infestation 
    Hart, R.J.; Wagner, Adriana M.; 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)
    In two experiments, sheep under controlled conditions were artificially infested with the hookworm Gaigeria pachyscelis Railliet & Henry, 1910. The effects of the helminth infestation on the host's metabolism were monitored ...
  • Pneumocystosis in a domestic goat 
    McConnell, E.E.; Basson, P.A.; Pienaar, J.G.; 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)
    A fatal case of an infection by the parasite, Pneumocystis carinii Delanoë & Delanoë, 1914, is described in a young domestic goat. The disease was manifested as a severe diffuse interstitial pneumonitis accompanied by ...
  • Evaluation of serological tests as criteria for immunity to staphylococcal skin infection in rabbits 
    Cameron, Colin McKenzie; 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)
    Rabbits immunized with killed whole culture vaccine, bacteria alone or bacteria plus toxoid, were markedly more resistant to skin infection than control rabbits. However, the degree of immunity was not related to the ...
  • Studies on Dictyocaulus filaria. II. Migration of the developmental stages in lambs 
    Anderson, P.J.S.; Verster, Anna; 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)
    Developmental stages of Dictyocaulus filaria (Rudolphi, 1809) were recovered from the right colic mesenteric lymph nodes of lambs 18 hours after infestation . The majority of the parasites remain in the lymph nodes until ...
  • Clinicopathological study on experimental Trypanosoma brucei infections in horses. Part 1. Development of clinically recognizable nervous symptoms in nagana-infected horses treated with subcurative doses of Antrypol and Berenil 
    Neitz, W.O.; McCully, R.M.; 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)
    Studies on the pathogenesis and symptomatology of the acute and chronic forms of human sleeping sickness and those appearing in equine nagana caused by Trypanosoma brucei Plimmer & Bradford, 1899 are given. In man the ...
  • Reproductive physiology and endocrinology of normal and habitually aborting Angora goats 
    Van Rensburg, S.J.; 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)
    Recurrent abortion of non-infectious or non-organic origin is exceedingly prevalent in many species including man, yet virtually no information on possible metabolic and endocrine causes was available. In order to study ...
  • The toxic antigenic factors produced by Clostridium botulinum 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 toxic factors produced by Clostridium botulinum (Van Ermengem, 1896), types C and D were determined. Monospecific antisera were prepared against the different factors. It was shown that type Cα produces factors C₁ ...
  • Cattle and Culicoides biting midges as possible overwintering hosts of bluetongue virus 
    Nevill, Errol Matson; 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)
    Light trap catches over 7 years at the Veterinary Research Institute, Onderstepoort showed that Culicoides adults are active on occasional winter nights and in some years remain active almost throughout the winter. ...
  • Immunological and chemical characteristics of Corynebacterium pseudotuberculosis cell walls and protoplasm 
    Cameron, Colin McKenzie; Purdom, Mary R.; 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)
    Successive extraction of purified Corynebacterium pseudotuberculosis cell walls with ether: ethanol, cold and hot trichloroacetic acid and crystalline trypsin did not destroy their immunizing potency. Cell walls were not ...
  • Some parasitic and other natural diseases of the African elephant in the Kruger National Park 
    Basson, P.A.; McCully, R.M.; De Vos, Valerius; Young, E.; Kruger, S.P.; 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)
    Detailed descriptions are given of the lesions encountered at autopsy on a random selection of 32 free-living African elephants [Loxodonta africana (Blumenbach, 1797)]. Lymphoid nodules with inclusion bearing syncytia ...