Browsing 1971 Onderstepoort Journal of Veterinary Research, Volume 38, 1971 by Title

Browsing 1971 Onderstepoort Journal of Veterinary Research, Volume 38, 1971 by Title

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  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • 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 ...
  • Studies on Dictyocaulus filaria. IV. The morphogenesis of the parasitic stages in lambs 
    Verster, Anna; 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)
    In males the parasitic 3rd stage, 3rd moult, 4th stage, 4th moult and 5th stage are reached on Days 1 to 2, 3, 4, 5 to 6 and 8 respectively. The 4th stage is swollen in the anal region and accessory genitalia differentiate ...
  • 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 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 ...
  • 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 ...