Browsing by UP Author "Prozesky, Leon"

Browsing by UP Author "Prozesky, Leon"

Sort by: Order: Results:

  • Prozesky, Leon; Anderson, L.A.P.; Schultz, R.A. (Rowena Anitra); Joubert, J.P.J.; Kellerman, T. Stephanus; Erasmus, G.L.; Procos, J.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1983)
    Three toxic bufadienolides, one characterized as hellibrigenin 3-acetate, have been isolated from Kalanchoe lanceolata Forsk. Typical signs of cardiac glycoside poisoning, involving the gastro-intestinal, neuromuscular ...
  • Masgoret, M.S.; Botha, C.J. (Christoffel Jacobus); Myburgh, Jan G.; Naude, T.W.; Prozesky, Leon; Naidoo, Vinny; Van Wyk, J.H.; Pool, E.J.; Swan, Gerry E. (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2009-06)
    During the mid 1990s a potentially serious, chronic syndrome was reported in well-managed beef and dairy herds from unrelated parts of South Africa. Farmers reported that it manifested as various combinations of decreased ...
  • Manzana, Nonzwakazi Patience; McCrindle, Cheryl Myra Ethelwyn; Sebei, Phokgedi Julius; Prozesky, Leon (OpenJournals Publishing, 2014-07-09)
    Land redistribution was legislated in 1994; it was designed to resolve historical imbalances in land ownership in South Africa. Between 2002 and 2006, a longitudinal observational study was conducted with 15 purposively ...
  • Prozesky, Leon; Kellerman, T. Stephanus; Jordaan, P.; Welman, Wilhelmina G.; Joubert, J.P.J.; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1985)
    A field outbreak of Hertia pallens poisoning in sheep is described. The hepatotoxicity of the plant was experimentally demonstrated in 7 sheep which developed lesions that ranged from a diffuse degeneration to centrilobular ...
  • Prozesky, Leon; Kellerman, T. Stephanus; Welman, Wilhelmina G.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1986)
    The hepatotoxicity of Pteronia pallens was demonstrated in 5 sheep which developed lesions that ranged from centrilobular necrosis to diffuse hepatocellular degeneration. Botanical, clinical and pathological data are given ...
  • Prozesky, Leon; Joubert, J.P.J.; Ekron, M.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)
    An experiment was undertaken to determine whether an overdose of the anthelmintic parbendazole could cause paralysis in lambs when given to ewes during the early stages of pregnancy. Out of a total of 68 lambs, born from ...
  • Du Plessis, Elizabeth C.; Prozesky, Leon; Botha, C.J. (Christoffel Jacobus) (South African Veterinary Association, 2011-08)
    Toxicity in cattle by the shrub Nolletia gariepina was induced experimentally by intraruminal administration of 3 g/kg dried, milled plant material as a single dose. The animals had to be starved for 24 hours before ...
  • Prozesky, Leon; Van der Lugt, Jaco J.; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1989)
    Blindness attributed to vitamin A deficiency afflicted 47 out of 197, and 15 out of 29 new-born dairy calves on 2 farms. Other clinical signs included doming of the forehead, thickening of the carpal joints, incoordination ...
  • Prozesky, Leon; Du Plessis, J.L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1985)
    Gross and microscopical lesions in mice intravenously infected with the Welgevonden strain of Cowdria ruminantium closely resembled the lesions described in cattle, sheep and goats. A high concentration of organisms was ...
  • Prozesky, Leon; Du Plessis, J.L.; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1985)
    Lung lesions in sheep and goats infected with the Ball₃ strain of Cowdria ruminantium corresponded with those reported in mice infected with the Welgevonden strain of Cowdria ruminantium. Ultrastructural changes in the ...
  • 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 pathological changes in cattle, sheep, goats, mice and various game species infected with Cowdria ruminantium are summarized. Macroscopical lesions in most animals include effusion of body cavities, oedema of the lungs ...
  • Prozesky, Leon; Kellerman, T. Stephanus; Schultz, R.A. (Rowena Anitra); Rabie, C.J.; Van Ark, H.; Maartens, B.P.; Lubben, Annelie; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)
    During 1987 when cob rot was rife, perinatal losses were reported in flocks and herds that had been exposed to diplodiosis. The affected lambs or calves were either stillborn or died soon after birth. Dosing trials at the ...
  • Prozesky, Leon; Kellerman, T. Stephanus; Maartens, B.P.; Schultz, R.A. (Rowena Anitra); Swart, D. Petro; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Previously published results of dosing trials, involving 82 ewes, revealed that 66% of the offspring of dams exposed to cultures of Diplodia maydis in the second trimester of pregnancy and 87% of lambs of ewes exposed ...
  • Prozesky, Leon; Neser, Johan; Meissner, Heinz; Botha, Kenneth; Jacobs, Lubbe; Shepstone, Craig; Viljoen, Hannes; Koster, Hinner; De Brouwer, Chris; Van Zyl, Jan; Van der Veen, Gerjan (AOSIS OpenJournals, 2016-07-27)
    The north-western part of South Africa, in particular, is well known for mineral imbalances. Aphosphorosis, resulting in rickets and osteomalacia, received a lot of attention at the turn of the nineteenth century ...
  • Van der Veen, Gerjan; Fosgate, Geoffrey T.; Botha, Frederick K.; Meissner, Heinz; Jacobs, Lubbe; Prozesky, Leon (AOSIS OpenJournals, 2017-02-24)
    Since 1982, farmers in the North West province and other parts of South Africa have noticed an increase in the incidence of lameness in cattle. Macro- and microscopical lesions of joints resembled osteochondrosis. Pre-trial ...
  • Prozesky, Leon; Theodoridis, A.; Els, H.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., 1980)
    Mild to severe scouring could be produced in colostrum-deprived calves with tissue culture adapted rota virus and faecal material from field cases of calf diarrhoea. The faeces of experimentally infected calves contained ...
  • Prozesky, Leon; Barnard, B.J.H.; Steyn, P.J.J.; Bigalke, R.D.; Cameron, Colin McKenzie; Gilchrist, Frances M.C.; Jordaan, E.; Morren, A.J.; Verster, Anna J.M.; Verwoerd, Daniel Wynand; Walker, Jane B. (Published by The Government Printer, Pretoria, 1982)
    Microscopic lesions in cattle infected with the virus of the Neethling form of lumpy skin disease comprised a granulomatous reaction in the dermis and hypodermis which extended to the surrounding tissue. During the early ...
  • Steyl, Johan Christian Abraham; Prozesky, Leon; Stoltsz, Wilhelm Heinrich (Agricultural Research Council, ARC-OVI and the University of Pretoria, 2012-04-20)
    Four hand-reared, naïve roan antelope, 4 months of age, were exposed to naturally infected pasture on a game farm in Mpumalanga Province, South Africa, where roan are known to die from theileriosis. Various clinical ...
  • Dimande, Alberto Francisco Paulo; Botha, C.J. (Christoffel Jacobus); Prozesky, Leon; Bekker, Lizette C.; Rosemann, G.M. (Gertruida Magdalena); Labuschagne, Leonie; Retief, E. (South African Veterinary Association, 2007-09)
    This study was designed to confirm the toxicity of a plant implicated in an outbreak of poisoning of stock in Frankfort, Free State Province, South Africa. Cows died acutely after being introduced into a camp, where an ...
  • Prozesky, Leon; Hart, Alet; Kocan, Katherine M.; Bezuidenhout, J. Dürr; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)
    Amblyomma hebraeum male and female ticks, experimentally infected as larvae with the Ball 3 stock of Cowdria ruminantium, were fed on a heartwater susceptible sheep. The initial attachment of the males was required as a ...