Browsing 1981 Onderstepoort Journal of Veterinary Research, Volume 48, 1981 by Title

Browsing 1981 Onderstepoort Journal of Veterinary Research, Volume 48, 1981 by Title

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  • A comparative study of the toxicity of Fusarium verticillioides (= F. moniliforme) to horses, primates, pigs, sheep and rats 
    Kriek, N.P.J.; Kellerman, T. Stephanus; Marasas, Walter F.O. (Walter Friedrich Otto); 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. (Published by The Government Printer, Pretoria, 1981)
    An isolate of Fusarium verticillioides (MRC826) that induced experimental leukoencephalomalacia, also caused acute toxicity when fed to pigs and administered per rumen fistula to sheep. Pigs developed severe pulmonary ...
  • A comparison of an Australian bluetongue virus isolate (CSIRO 19) with other bluetongue virus serotypes by cross-hybridization and cross-immune precipitation 
    Huismans, H. (Henk), 1942-; Bremer, C.W.; 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. (Published by The Government Printer, Pretoria, 1981)
    No major differences in size were observed when both the double-stranded RNA and the polypeptides of the Australian bluetongue virus (BTV) isolate CSIRO 19 (BTV-20) were compared with those of other BTV serotypes such as ...
  • The control of Simuliidae (Diptera, Nematocera) in South African rivers by modification of the water flow volume 
    Howell, C.J.; Begemann, G.J.; Muir, R.W.; Louw, P.; 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. (Published by The Government Printer, Pretoria, 1981)
    It was found that the build-up of simuliid numbers subsequent to the construction of dams in the Vaal and Orange Rivers could be successfully prevented by periodic, artificially controlled reductions in the water-levels ...
  • The development of Parafilaria bovicola in Musca xanthomelas and Musca lusoria 
    Nevill, E.M.; 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. (Published by The Government Printer, Pretoria, 1981)
    Artificially infected adult flies were used in this study. In both Musca species, P. bovicola developed in the fat-body cells, mainly of the abdomen. Escape from the midgut and penetration of the fatbody cell was possibly ...
  • Ecological studies on Ixodes (Afrixodes) matopi Spickett, Keirans, Norval & Clifford, 1980 (Acarina: Ixodidae) 
    Colborne, J.; Norval, R.A.I.; Spickett, Arthur M.; 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. (Published by The Government Printer, Pretoria, 1981)
    Ixodes (Afrixodes) matopi occurs in association with the klipspringer (Oreotragus oreotragus) in rocky areas in Zimbabwe. The adult ticks are specific parasites of this antelope and the immature stages feed on klipspringers, ...
  • The efficacy of bacteriological procedures for the isolation of Brucella abortus from abattoir material 
    Herr, S.; Roux, D.; 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. (Published by The Government Printer, Pretoria, 1981)
    A process of emulsifying and centrifuging abattoir specimens before plating out is described. Brucella abortus was isolated more successfully by this process than by conventional methods, especially in low grade infections. ...
  • First report of annual ryegrass toxicity in the Republic of South Africa 
    Schneider, D.J.; 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. (Published by The Government Printer, Pretoria, 1981)
    The occurrence of annual ryegrass toxicity (ARGT) in sheep and cattle is reported for the first time in South Africa. To date it has been diagnosed conclusively in South African Mutton Merino sheep on a farm in the Caledon ...
  • Freeze-drying of Anaplasma marginale 
    Potgieter, F.T.; Bester, J.B.; 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. (Published by The Government Printer, Pretoria, 1981)
    Heparinized whole blood, heavily parasitized with Anaplasma marginale, was collected from 3 splenectomized oxen. Buffered lactose peptone (BLP) was added in equal volumes as a stabilizer and the mixture lyophilized in ...
  • The haemocytology and histology of the haemopoietic organs of South African freshwater fish. III. The leucocytes, plasma cells and macrophages of Clarias gariepinus and Sarotherodon mossambicus 
    Boomker, Jacob Diederik Frederik; 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. (Published by The Government Printer, Pretoria, 1981)
    The various leucocytes, plasma cells and macrophages are described and illustrated. Eosinophils and basophils are lacking in Clarias gariepinus but present in Sarotherodon mossambicus. The leucocytes of C. gariepinus ...
  • The haemocytology and histology of the haemopoietic organs of South African freshwater fish. IV. Ultrastructure of some cells of Clarias gariepinus and Sarotherodon mossambicus 
    Boomker, Jacob Diederik Frederik; 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. (Published by The Government Printer, Pretoria, 1981)
    This paper describes the ultrastructure of several cells found in the blood and haemopoietic tissues of the catfish (Clarias gariepinus) and the Mozambique bream (Sarotherodon mossambicus). The cells are haemocytoblasts, ...
  • Identification of the serotype-specific and group-specific antigens of bluetongue virus 
    Huismans, H. (Henk), 1942-; Erasmus, B.J.; 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. (Published by The Government Printer, Pretoria, 1981)
    The bluetongue virus (BTV) core particle contains 2 major polypeptides, P3 and P7, and is surrounded by an outer capsid layer that is composed of the 2 major polypeptides, P2 and P5. Analysis of the immune precipitates ...
  • The influence of dithiosemicarbazone on the immunity of sheep to heartwater 
    Du Plessis, J.L.; 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. (Published by The Government Printer, Pretoria, 1981)
    Four out of 9 sheep, immune to heartwater and subsequently treated with gloxazone, showed a febrile reaction when they were challenged 6 months later, but the same number of untreated controls also developed this reaction. ...
  • An investigation into the toxic principle in eggs of the tick Amblyomma hebraeum 
    Prozesky, Leon; Neitz, Albert Walter Herman; Bezuidenhout, J. Dürr; Putterill, John Fraser; Potgieter, D.J.J.; 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. (Published by The Government Printer, Pretoria, 1981)
    A purification procedure involving iso-electric focusing by means of which a toxic principle may be obtained in a pure form from crude egg extracts of Amblyomma hebraeum is described. The molecular mass of the toxin is ...
  • Isolation and significance of anaerobic bacteria isolated from cases of bovine mastitis 
    Du Preez, J.H.; Greeff, A.S.; Eksteen, Nicolene; 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. (Published by The Government Printer, Pretoria, 1981)
    The role of obligate anaerobic bacteria in the aetiology of mastitis of lactating dairy cows was investigated. Anaerobes were isolated from 12% of lactating mastitic cows, which were representative of 50% of the 10 dairy ...
  • Isolation and transmission of an unidentified Babesia sp. infective for cattle 
    Thomas, Shan E.; Mason, T.E.; 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. (Published by The Government Printer, Pretoria, 1981)
    Engorged adult female ticks submitted from farms in South Africa were routinely screened for protozoan parasites by examination of haemolymph smears. An unidentified Babesia sp. was found in Hyalomma marginatum rufipes and ...
  • The isolation of Theileria? taurotragi in South Africa 
    De Vos, A.J.; Roos, J.A.; 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. (Published by The Government Printer, Pretoria, 1981)
    In 3 out of 4 attempts strains of a Theileria sp. of low virulence were isolated in the laboratory by feeding adult Rhipicephalus appendiculatus collected from the field on susceptible cattle. One of the strains, previously ...
  • Ixodes (Afrixodes) matopi n. sp. (Acarina: Ixodidae) : a tick found aggregating on pre-orbital gland scent marks of the klipspringer in Zimbabwe 
    Spickett, Arthur M.; Keirans, J.E.; Norval, R.A.I.; Clifford, C.M.; 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. (Published by The Government Printer, Pretoria, 1981)
    Ixodes (Afrixodes) matopi n. sp. is described from females and males collected off twigs bearing deposits of intraspecific communication marks secreted by the pre-orbital glands of the klipspringer Oreotragus oreotragus ...
  • Levels of glucose, serum albumin and somatic cells before and during early stages of acute clinical mastitis artificially induced in cows by means of human strains of group-B streptococci (GBS) administered intracisternally 
    Giesecke, W,H,; Van den Heever, Louwrens Wepener; 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. (Published by The Government Printer, Pretoria, 1981)
    The investigation was performed on 3 cows, sampled repeatedly before and during the initial 48h of artificially induced, acute, clinical mastitis. The results of the investigation both augment and support those of earlier ...
  • Non-specific esterase isoenzymes of adult schistosomes from the hippopotamus (Hippopotamus amphibius) 
    Fripp, P.J.; 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. (Published by The Government Printer, Pretoria, 1981)
    Extracts of adult schistosomes collected from Hippopotamus amphibius in the Kruger National Park gave alpha naphthyl acetate isoenzyme patterns after polyacrylamide gel electrophoresis that did not correspond with those ...
  • Notes on African Haemaphysalis ticks. XIII. Identity of H. (Rhipistoma) cooleyi, a parasite of the rock hyrax in South Africa (Acarina: Ixodidae) 
    Hoogstraal, H.; Wassef, Hilda Y.; 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. (Published by The Government Printer, Pretoria, 1981)
    The lectotype male, allotype female, and paratype nymph of Haemaphysalis (Rhipistoma) cooleyi Bedford, 1929, a parasite of the rock hyrax, Procavia capensis, in the Transvaal, are redescribed and illustrated to provide ...