Browsing 1975 Onderstepoort Journal of Veterinary Research, Volume 42, 1975 by Type "Article"

Browsing 1975 Onderstepoort Journal of Veterinary Research, Volume 42, 1975 by Type "Article"

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  • An apparatus for the restraint of sheep during infestation with schistosomes 
    Van Wyk, Jan Aucamp; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Walker, Jane B.; Verster, Anna J.M. (Published by The Government Printer, Pretoria, 1975)
    With this adjustable apparatus sheep aged from five months to five years and varying in mass from 16-95 kg could be restrained effectively. Cercarial suspension was spilt by only 2/44 sheep during infestation with Schistosoma ...
  • Blindness and encephalopathy caused by Helichrysum argyrosphaerum DC (Compositae) in sheep and cattle 
    Basson, P.A.; Miller, E.S.; Kellerman, T. Stephanus; Albl, P.; Von Maltitz, L.J.F.; Welman, Wilhelmina G.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    An outbreak of amaurosis and paresis was observed amongst sheep, and occasionally cattle, which had been grazing on pastures consisting mainly of Helichrysum argyrosphaerum DC. A similar syndrome was produced by feeding ...
  • Blood parasites of some wild Bovidae in Botswana 
    Carmichael, I.H.; Hobday, Elizabeth; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Blood smears from a total of 282 wild Bovidae from Ngamiland, Botswana were examined for the presence of blood parasites. The following species were sampled: 190 African buffalo, 23 impala, I0 blue wildebeest, 18 tsessebe, ...
  • The effect of Clostridium perfringens epsilon toxin on the blood-brain barrier of mice 
    Worthington, R.W.; Mulders, M.S.G.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    It was shown that Clostridium perfringens epsilon toxin has the effect of allowing the passage of ¹²⁵I polyvinyl-pyrrolidone and ¹²⁵I human serum albumin into mouse brain. These substances did not enter the brains of ...
  • Electron microscopy of Cowdria ruminantium infected reticulo-endothelial cells of the mammalian host 
    Du Plessis, J.L.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    An electron microscopic study of structures suspected to represent a possible developmental cycle of Cowdria ruminantium in reticulo-endothelial cells of mice and ruminants is reported. After infection dense bodies increase ...
  • Gross and microscopic observations of ovarian abnormalities from five Burchell's zebra, Equus burchelli antiquorum, Smith 1841 
    Imes, G.D.; Smuts, G.L.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Five pair of zebra ovaries were submitted to the Onderstepoort Veterinary Research Institute for examination because of unusual uni- and/or bilateral gross appearances. Microscopic findings revealed an accessory spleen ...
  • Helminths recovered from the bontbok, Damaliscus dorcas dorcas (Pallas, 1766) 
    Smit, J.P.J.; Verster, Anna Johanna Maria.; Imes, G.D.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna Johanna Maria; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    A report is given on the helminths collected from 4 bontbok, Damaliscus dorcas dorcas, which died following capture at the Bontebok National Park, Swellendam, and transfer to the National Zoological Gardens, Pretoria. ...
  • A histological study of the effect of cortisol and some sex steroids on the immune response to sheep erythrocytes by the mouse 
    Hellig, H.R.; Gerneke, W.H.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Sections of the spleen, thymus, lymph nodes and liver, collected from mice at various time intervals after injection with either steroid hormones only, sheep red blood cells (SRBC) only, or SRBC plus steroid hormones, were ...
  • Immunization of mice and guinea-pigs against Salmonella dublin infection with live and inactivated vaccine 
    Cameron, Colin McKenzie; Fuls, W.J.P.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    The immunogenicity of a number of avirulent rough Salmonella dublin mutants was compared in mice and guinea-pigs. Live vaccine prepared from Strain HB 1/17 at doses of 5 x 10⁷ per mouse usually gave an immunity of between ...
  • Inhibition of macrophage migration in Salmonella immunity 
    Cameron, Colin McKenzie; Van Rensburg, J.J.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Protein antigens were prepared from rough strains of Salmonella typhimurium and S. dublin by phenol and veronal-buffer extraction. It was shown that the in vitro migration of peritoneal exudate cells from guinea pigs ...
  • Ixodes (Afrixodes) drakensbergensis n. sp. from domestic and wild animals in Natal, Republic of South Africa 
    Clifford, C.M.; Baker, M.; Theiler, Gertrud; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Ixodes (Afrixodes) drakensbergensis n. sp., is described from females, males, nymphs and larvae collected on a drag at Giant's Castle Nature Reserve, Natal, Republic of South Africa; it was also taken from an eland in ...
  • Observations on naturally acquired hepatozoonosis of wild carnivores and dogs in the Republic of South Africa 
    Young, E.; De Vos, Valerius; Bigalke, R.D.; Basson, P.A.; McCully, R.M.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Hepatozoonosis was studied in hyaenas, lions, jackals, cheetahs and one leopard in the Kruger National Park and compared with the condition seen in dogs in the Republic of South Africa. Hepatozoon schizonts were found in ...
  • The occurrence and pathology of chlamydiosis in domestic and laboratory animals : a review 
    Pienaar, J.G.; Schutte, A.P.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    The literature on the various disease syndromes caused by chlamydia in domestic and laboratory animals is summarized. A review of the pathological lesions which characterize these diseases is presented and the pathogenesis ...
  • An outbreak of ringworm in Karakul sheep caused by a physiological variant of Trichophyton verrucosum Bodin 
    Scott, D.B.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    An outbreak of ringworm in Karakul sheep occurred during 1973 among the flocks of at least 14 farmers in South West Africa and the Northern Cape Province. Infections spread from one farm to another as a result of introducing ...
  • The partial purification of Clostridium perfringens Beta toxin 
    Mulders, M.S.G.; Worthington, R.W.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    An attempt was made to purify Clostridium perfringens Beta toxin. Crude toxin prepared by ammonium sulphate precipitation of culture supernatants was purified by chromatography on Sephadex G50, Sephadex G100 and DEAE ...
  • Preliminary report on the transmission of Parafilaria bovicola in South Africa 
    Nevill, E.M.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    The filarial worm Parafilaria bovicola causes streaks of blood on the skins of live cattle and slimy bruise-like lesions on the subcutaneous surfaces of their carcases. To determine the vectors of this worm a field survey ...
  • A rapid spectrophotometric method for the monitoring of embryonic development in ticks (Acarina : Ixodoidea) 
    Londt, J.G.H.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    A rapid spectrophotometric method for the monitoring of embryonic development in Boophilus decoloratus (Koch, 1844) is described. The method is based on a quantitative assessment of guanine, the principal end-product of ...
  • Some observations on the use of D-glucose-2-³H as a tracer in turnover studies in Merino sheep 
    Van der Walt, J.G.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Bolus Injection of a mixture of D-g1ucose-2-³H and -(U)-¹⁴C into each sheep enabled a turnover rate to be calculated for each isotope and to be compared in the same animal. No statistically significant differences were ...
  • Some protozoan parasites of wild birds from the vicinity of Onderstepoort 
    Thomas, Shan E.; Dobson, Lynne D.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    The protozoan parasites of wild birds from the vicinity of Onderstepoort are recorded. New host records for the Republic of South Africa are: Haemoproteus in Threskiornis aethiopicus, Francolinus swainsonii, Columba guinea ...
  • Some toxic, physical and chemical properties of the oral secretion of the sand tampan, Ornithodoros savignyi Audouin (1827) 
    Howell, C.J.; Neitz, Albert Walter Herman; Potgieter, D.J.J.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Mice, exposed to the effects of the oral secretion of Ornithodorus savignyi by injection, revealed that a potent toxin is present in the secretion. Electrophoretic and chromatographic separations of the secretion showed a ...