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Browsing by UP Author "Prozesky, Leon"
Now showing items 1-20 of 43
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Prozesky, Leon; Fourie, Niel; Bastianello, Stella S.; Nel, P.W.; Kellerman, T. Stephanus; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)The epidemiological, clinical and clinical pathological findings in 20 cattle and 4 sheep from 15 outbreaks of poultry litter toxicity in South Africa over the past 6 years are documented. In 6 outbreaks, the litter emanated ...
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Prozesky, Leon; Bastianello, Stella S.; Fourie, Niel; Nel, P.W.; Kellerman, T. Stephanus; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1995)This report contains an account of the gross and histopathological lesions of 20 cattle and four sheep in 15 field outbreaks of poultry litter toxicity, one steer fed ad lib. and six sheep dosed with toxic poultry litter, ...
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Prozesky, Leon; Fourie, Niel; Kellerman, T. Stephanus; Labuschagne, Leonie; Schultz, R.A. (Rowena Anitra); Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1989)Twenty sheep were dosed with either Pachystigma pygmaeum or Fadogia homblei belonging to the Rubiaceae. The experimentally-induced cardiotoxicoses were monitored by various clinical pathological parameters and heart ...
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Meiring, Thelma; Prozesky, Leon; Du Preez, Eben R.; Verwoerd, Dirk J. (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2011-08)Bovine viral diarrhoea virus (BVDV) infection is an important viral infection affecting the cattle industry today. The prevalence of this infection in South African feedlots is unknown. Ear notch biopsies were collected ...
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Prozesky, Leon; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)Criteria that are required to confirm heartwater in ruminants and mice are discussed. In ruminants it entails the microscopical and macroscopical lesions as well as the identification of Cowdria ruminantium in brain smears ...
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Bengis, Roy; Govender, Dhanashree (Danny); Lane, Emily; Myburgh, Jan G.; Oberholster, Paul Johan; Buss, Peter Erik; Prozesky, Leon; Dewald, Keet (AOSIS OpenJournals, 2016-10-31)Over the past decade, several clustered, multispecies, wildlife mortality events occurred in the vicinity of two man-made earthen dams in the southern and south central regions of the Kruger National Park, South Africa. ...
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Prozesky, Leon; Schultz, R.A. (Rowena Anitra); Fourie, Niel; Basson, Karin M.; Labuschagne, Leonie; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2001)Pavetamine, the active principle of plants causing gousiekte in ruminants, was found in this study to be an inhibitor of protein synthesis in the rat heart. Sprague-Dawley rats were injected intra-peritoneally with 8-10 ...
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Prozesky, Leon; Anderson, L.A.P.; Joubert, J.P.J.; Kellerman, T. Stephanus; Schultz, R.A. (Rowena Anitra); Procos, J.; Olivier, Philippa M.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1983)Six bufadienolides were isolated from Tylecodon grandiflorus (Burm. f.) Toelken. The paretic syndrome, krimpsiekte, could be induced in sheep either by repeated oral administration of small quantities of plant material or ...
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Prozesky, Leon; Fourie, Niel; Neser, J.A.; Nel, P.W.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1988)A field outbreak of Pachystigma pygmaeum intoxication in sheep is described. Noteworthy clinical signs were: respiratory distress, apathy and subcutaneous oedema of mainly the head. Gross changes included cardiomegaly, ...
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Lawrence, John A.; Foggin, Chris M.; Prozesky, Leon (South African Veterinary Association, 2010)Three African buffalo (Syncerus caffer) that died after capture and translocation from Mutirikwe Recreational Park in southern Zimbabwe showed macroscopic and microscopic lesions of cardiomyopathy compatible with a ...
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Prozesky, Leon; Du Plessis, J.L.; Jansen, B.C.; Bigalke, R.D. (Pretoria : The Government Printer, 1983)
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Prozesky, Leon; Du Plessis, J.L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1985)Pathological lesions in untreated Angora goats infected with the Ball₃ strain of Cowdria ruminantium corresponded with those previously reported. A severe nephrosis was the most prominent pathological lesion in the animals ...
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Prozesky, Leon; Heartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa); Bigalke, R.D. (Published by the Government Printer, Pretoria., 1987)The artificial transmission of Cowdria ruminantium with infected blood, organ homogenates, peritoneal macrophages, tick stabilate and tissue culture cells is discussed. Organ homogenates prepared from the myocardium, spleen, ...
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Prozesky, Leon; Paterson, C.L.; Bezuidenhout, J. Dürr; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1986)Notwithstanding morphological differences, the ultrastructure of Cowdria ruminantium cultured in vitro concurred to a large extent with that in previous in vivo studies. Two distinct forms of the organism, elementary and ...
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Prozesky, Leon; Trichard, C.J.V.; Jordaan, P.; Jacobsz, Elsie P.; Henton, Marijke M.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1993)Clinical ulcerative balanoposthitis and vulvovaginitis was experimentally reproduced in 14 sheep infected with a Mycoplasma mycoides mycoides LC field strain, isolated from the Straussheim Dorper stud. The study encompassed ...
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Prozesky, Leon; Kellerman, T. Stephanus; Rabie, C.J.; Van der Westhuizen, G.C.A.; Kriek, N.P.J.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1985)Diplodiosis, a neuromycotoxicosis, principally of cattle, which is characterized by ataxia, paresis and paralysis, was induced in 13 cattle, 16 sheep and 3 goats, by dosing them with Diplodia maydis [=D. zeae (Schw.) Lév.] ...
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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 ...
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Prozesky, Leon; Anderson, L.A.P.; Schultz, R.A. (Rowena Anitra); Kellerman, T. Stephanus; Kotze, S.M.; Erasmus, G.L.; Labuschagne, Leonie; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1985)The approximate LD₅₀ and cumulative effect of 4 bufadienolides, isolated from Cotyledon orbiculata, were determined in guinea-pigs. Two of the bufadienolides proved to be mildly cumulative. One of the mildly cumulative ...
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Prozesky, Leon; Verschoor, J.A. (Jan Adrianus), 1953-; Neitz, Albert Walter Herman; Viljoen, Gerrit Johannes; Vermeulen, N.M.J.; Oberem, P.T.; Bezuidenhout, J. Dürr; Putterill, John Fraser; Visser, L.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1985)The isolation of Cowdria ruminantium by means of wheat germ lectin affinity chromatography as described in this paper permits the recovery of partially purified viable organisms under mild conditions in short time. These ...
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Prozesky, Leon; Fourie, Niel; Erasmus, G.L.; Schultz, R.A. (Rowena Anitra); Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1995)Gousiekte was induced in sheep and goats by the oral and intravenous (i/v) administration of methanolic and ethanolic precipitates of aqueous extracts of Pavetta harborii. Further purification of the toxic principle was ...
Now showing items 1-20 of 43