Browsing by UP Author "Prozesky, Leon"

Browsing by UP Author "Prozesky, Leon"

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  • Krimpsiekte and acute cardiac glycoside poisoning in sheep caused by bufadienolides from the plant Kalanchoe lanceolata Forsk 
    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 ...
  • Molasses as a possible cause of an ''endocrine disruptive syndrome'' in calves 
    Masgoret, M.S.; Botha, C.J. (Christoffel Jacobus); Myburgh, Jan G.; Naude, T.W.; Prozesky, Leon; Naidoo, Vinny; Van Wyk, J.H. (Amie); 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 ...
  • A new perspective on the pathogenesis of chronic renal disease in captive cheetahs (Acinonyx jubatus) 
    Mitchell, Emily P.; Prozesky, Leon; Lawrence, John A. (Public Library of Science, 2018-03-07)
    The sustainability of captive cheetah populations is limited by high mortality due to chronic renal disease. This necropsy study, conducted on 243 captive cheetahs from one institution, investigated the relationships ...
  • Optimal feeding systems for small scale dairy herds in the North-West Province, South Africa 
    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 ...
  • An ovine hepatotoxicosis caused by the plant Hertia pallens (DC.) Kuntze (Asteraceae) 
    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 ...
  • An ovine hepatotoxicosis caused by the plant Pteronia pallens (Asteraceae) L.f. 
    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 ...
  • Paralysis in lambs caused by overdosing with parbendazole 
    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 ...
  • The pathology of acute Nolletia gariepina poisoning of cattle 
    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 ...
  • The pathology of blindness in new-born calves caused by hypovitaminosis A 
    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 ...
  • The pathology of heartwater. I. A study of mice infected with the Welgevonden strain of Cowdria ruminantium 
    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 ...
  • The pathology of heartwater. II. A study of the lung lesions in sheep and goats infected with the Ball₃ strain of Cowdria ruminantium 
    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 ...
  • The pathology of heartwater. III. A review 
    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 ...
  • Perinatal mortality in lambs of ewes exposed to cultures of Diplodia maydis (= Stenocarpella maydis) during gestation 
    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 ...
  • Perinatal mortality in lambs of ewes exposed to cultures of Diplodia maydis (= Stenocarpella maydis) during gestation. A study of the central-nervous-system lesions 
    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 ...
  • Preliminary report on osteochondrosis in cattle in the north-western parts of South Africa 
    Prozesky, Leon; Neser, Johan; Meissner, H.H. (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 ...
  • Response of cattle with clinical osteochondrosis to mineral supplementation 
    Van der Veen, Gerjan; Fosgate, Geoffrey Theodore; Botha, Frederick K.; Meissner, H.H. (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 ...
  • Studies on neonatal calf diarrhoea caused by rotavirus : transmission of the disease and attempted vaccination of colostrum-deprived calves 
    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 ...
  • A study of the pathology of lumpy skin disease in cattle 
    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 ...
  • Theileriosis (Cytauxzoonosis) in Roan antelope (Hippotragus equinus) : field exposure to infection and identification of potential vectors 
    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 ...
  • The toxicity of Senecio inaequidens DC. 
    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 ...