Browsing by UP Author "Steyl, Johan Christian Abraham"

Browsing by UP Author "Steyl, Johan Christian Abraham"

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  • Babesia lengau associated with cerebral and haemolytic babesiosis in two domestic cats 
    Bosman, Anna-Mari; Oosthuizen, Marinda C.; Venter, Estelle Hildegard; Steyl, Johan Christian Abraham; Gous, Tertius A.; Penzhorn, Barend Louis (BioMed Central, 2013-05-01)
    BACKGROUND: Although reported sporadically from various countries, feline babesiosis appears to be a significant clinical entity only in South Africa, where Babesia felis is usually incriminated as the causative agent. ...
  • Clinical presentation and pathology of suspected vector transmitted African horse sickness in South African domestic dogs from 2006 to 2017 
    O'Dell, Nicolize; Arnot, L.F. (Luke); Janisch, Chris Eric; Steyl, Johan Christian Abraham (BMJ Publishing Group, 2018-06)
    African horse sickness (AHS) is a fatal vector transmitted viral disease of horses caused by the African horse sickness virus (AHSV). This disease is characterised by circulatory and respiratory failure, resulting from ...
  • Congenital reflex myoclonus in two Merino cross lambs in South Africa 
    Blignaut, David J.C.; Holm, Dietmar Erik; Leask, Rhoda; Stander, Nerissa; Steyl, Johan Christian Abraham (BMJ Publishing Group, 2011-12)
    No abstract available.
  • Conserving wildlife in a changing world : understanding capture myopathy—a malignant outcome of stress during capture and translocation 
    Breed, Dorothy; Meyer, Leith Carl Rodney; Steyl, Johan Christian Abraham; Goddard, Amelia; Burroughs, Richard E.J.; Kohn, Tertius Abraham (Oxford University Press, 2019-07)
    The number of species that merit conservation interventions is increasing daily with ongoing habitat destruction, increased fragmentation and loss of population connectivity. Desertification and climate change reduce ...
  • Cooling by dousing with cold water does not alter the pathophysiological biochemical changes induced by capture in blesbok (Damaliscus pygargus phillipsi) 
    Leiberich, Marion; Fitte, Agustina; Burroughs, Richard E.J.; Steyl, Johan Christian Abraham; Goddard, Amelia; Haw, Anna Jean; Boesch, Jordyn M.; Kohn, Tertius Abraham; Meyer, Leith Carl Rodney (Wildlife Disease Association, 2023)
    Wild animals are commonly captured for conservation, research, and wildlife management purposes. However, capture is associated with a high risk of morbidity or mortality. Capture-induced hyperthermia is a commonly encountered ...
  • Cross‑species oncogenomics offers insight into human muscle‑invasive bladder cancer 
    Wong, Kim; Abascal, Federico; Ludwig, Latasha; Aupperle‑Lellbach, Heike; Grassinger, Julia; Wright, Colin W.; Allison, Simon J.; Pinder, Emma; Phillips, Roger M.; Romero, Laura P.; Gal, Arnon; Roady, Patrick J.; Pires, Isabel; Guscetti, Franco; Munday, John S.; Peleteiro, Maria C.; Pinto, Carlos A.; Carvalho, Tania; Cota, Joao; Du Plessis, Elizabeth C.; Constantino‑Casas, Fernando; Plog, Stephanie; Moe, Lars; De Brot, Simone; Bemelmans, Ingrid; Amorim, Renee Laufer; Georgy, Smitha R.; Prada, Justina; Del Pozo, Jorge; Heimann. Marianne; De Carvalho Nunes, Louisiane; Simola, Outi; Pazzi, Paolo; Steyl, Johan Christian Abraham; Ubukata, Rodrigo; Vajdovich, Peter; Priestnall, Simon L.; Suarez‑Bonnet, Alejandro; Roperto, Franco; Millanta, Francesca; Palmieri, Chiara; Ortiz, Ana L.; Barros, Claudio S.L.; Gava, Aldo; Soderstrom, Minna E.; O’Donnell, Marie; Klopfleisch, Robert; Manrique‑Rincon, Andrea; Martincorena, Inigo; Ferreira, Ingrid; Arends, Mark J.; Wood, Geoffrey A.; Adams, David J.; Van der Weyden, Louise (BMC, 2023-08-28)
    BACKGROUND : In humans, muscle-invasive bladder cancer (MIBC) is highly aggressive and associated with a poor prognosis. With a high mutation load and large number of altered genes, strategies to delineate key driver ...
  • Erythrocyte morphology and haemoglobin types of neonatal roan antelopes (Hippotragus equinus) with hypochromic poikilocytic anaemia 
    Parsons, S.D.C.; Penzhorn, Barend Louis; Reyers, Fred; Steyl, Johan Christian Abraham; Becker, Piet J. (Elsevier, 2006)
    Neonatal, poikilocytic anaemia in some members of the Hippotragini has previously been documented but not fully investigated. This study was undertaken to describe the erythrocyte morphology of roan antelopes (Hippotragus ...
  • Feline panleukopaenia virus in captive non-domestic felids in South Africa 
    Lane, Emily P.; Brettschneider, Helene; Caldwell, Peter; Oosthuizen, Almero; Dalton, Desire L.; Du Plessis, Liza; Steyl, Johan Christian Abraham; Kotze, Antoinette (AOSIS OpenJournals, 2016-06-09)
    An outbreak of feline panleukopaenia virus (FPLV) infection was diagnosed by pathology, electron microscopy and polymerase chain reaction (PCR) in vaccinated captive-bred subadult cheetahs in South Africa. Subsequent to ...
  • Fiber type and metabolic characteristics of skeletal muscle in 16 breeds of domestic dogs 
    Van Boom, Kathryn Merle; Schoeman, Johan P.; Steyl, Johan Christian Abraham; Kohn, Tertius Abraham (Wiley, 2023-10)
    The domestic dog (Canis lupus familiaris) species comprises hundreds of breeds, each differing in physical characteristics, behavior, strength, and running capability. Very little is known about the skeletal muscle composition ...
  • Fire associated exertion myopathy as a mechanism contributing to mortality in Chamaesaura macrolepis (Cope 1862) 
    Jordaan, Philip R.; Steyl, Johan Christian Abraham (NISC (Pty) Ltd and Informa UK Limited (trading as Taylor & Francis Group), 2021)
    Following a fire event, an abnormally high number of Chamaesaura macrolepis (Cope 1862) road mortalities were observed on two sections of tar road south of Maputo Special Reserve, Maputo Province, Mozambique. Although most ...
  • Fire-associated reptile mortality in Tembe Elephant Park, South Africa 
    Jordaan, Philip R.; Steyl, Johan Christian Abraham; Hanekom, Catharine C.; Combrink, Xander (SpringerOpen, 2020-01-21)
    BACKGROUND : Even though fire has been used extensively as part of conservation management in South Africa, its impact on the life history and mortality of fossorial reptiles is poorly documented. We conducted post-fire ...
  • Fire-induced mortality and associated pathologies across functional reptile groups in relation to fire behaviour 
    Jordaan, Philip R.; Steyl, Johan (Societas Europaea Herpetologica, 2023-09)
    Variation in fire behaviour has been suggested to affect faunal species differently depending on their physical condition and functional traits. Following a management burn in the Munywana Conservancy, KwaZulu-Natal province, ...
  • Fire-induced reptile mortality following a management burn on Lapalala Wilderness (Limpopo Province, South Africa) with notes on the mechanisms of mortality 
    Jordaan, Philip R.; Van der Goot, Annemieke C.; Muller, Hermann P.; Steyl, Johan Christian Abraham (Societas Europaea Herpetologica, 2019-11-12)
    Despite a well-practiced fire management paradigm within southern African conservation areas, little research has been conducted on the effect of fire on native reptile diversity (Parr and Chown, 2003; Branch, 2014) however ...
  • Genotyping and comparative pathology of Spirocerca in black-backed jackals (Canis mesomelas) in South Africa 
    Bumpy, M.M.; Williams, Mark C.; Steyl, Johan Christian Abraham; Lutermann, Heike; Fosgate, Geoffrey Theodore; De Waal, Pamela Jean; Mitha, Janishtha R.; Clift, Sarah Jane; Harrison-White, R. (BioMed Central, 2017-08-16)
    BACKGROUND : The pathology of spirocercosis, a disease caused by the infestation of carnivores with the nematode Spirocerca lupi, has been extensively described in domestic dogs and coyotes. However, it has not been ...
  • Hepatogenous photosensitisation in cows grazing turnips (Brassica rapa) in South Africa 
    Davis, Anthony John; Collet, Mark G.; Steyl, Johan Christian Abraham; Myburgh, Jan G. (AOSIS, 2021-05)
    Holstein cows on a farm in the Humansdorp district, Eastern Cape province, South Africa, developed reddened, painful teat skin 3 days after grazing a mixed forage crop dominated by bulb turnip (Brassica rapa, Barkant ...
  • The histology and growth rate of Nile crocodile (Crocodylus niloticus) claws 
    Myburgh, Albert; Myburgh, Jan G.; Steyl, Johan Christian Abraham; Downs, Colleen T.; Botha, Hannes; Robinson, Liam; Woodborne, Stephan (Wiley, 2023-10)
    The histology and growth of reptilian and crocodilian claws (ungues) have been extensively studied; however, Nile crocodile (Crocodylus niloticus) claws have not received adequate attention. Furthermore, age estimations ...
  • Histopathology of the liver and gills of Labeo rosae (rednose Labeo) from Loskop Dam in South Africa 
    Lebepe, Jeffrey; Steyl, Johan Christian Abraham; Luus-Powell, Wilmien J. (NISC (Pty) Ltd and Informa UK Limited (trading as Taylor and Francis Group), 2020)
    The Loskop Dam is the most polluted impoundment in the Olifants River, because it receives pollutants from the entire mine-dominated upper catchment. However, histopathology of fish inhabiting this polluted dam is scantly ...
  • Lineage 2 West Nile virus as cause of fatal neurologic disease in horses, South Africa 
    Venter, Marietjie; Human, Stacey; Zaayman, Dewald; Gerdes, Gertruida Hermanna; Williams, June Heather; Steyl, Johan Christian Abraham; Leman, Patricia A.; Paweska, Janusz Tadeusz; Setzkorn, Hildegard; Rous, Gavin; Murray, Sue; Parker, Rissa; Donnellan, Cynthia Mary Bridget; Swanepoel, Robert (Coordinating Center for Infectious Diseases, Centers for Disease Control and Prevention, 2009-05-06)
    Serologic evidence suggests that West Nile virus (WNV) is widely distributed in horses in Southern Africa. However, because few neurologic cases have been reported, endemic lineage 2 strains were postulated to be non-pathogenic ...
  • Mortality in East African shorthorn zebu cattle under one year : predictors of infectious-disease mortality 
    Thumbi, Samuel Mwangi; Bronsvoort, Barend Mark de Clare; Kiara, Henry; Toye, Philip G.; Poole, Jane; Ndila, Mary; Conradie, Ilana; Jennings, Amy; Handel, Ian Graham; Coetzer, Jacobus A.W.; Steyl, Johan Christian Abraham; Hanotte, Olivier (BioMed Central, 2013-09-08)
    BACKGROUND: Infectious livestock diseases remain a major threat to attaining food security and are a source of economic and livelihood losses for people dependent on livestock for their livelihood. Knowledge of the ...
  • Mycotic rhinitis in a Mutton Merino ewe 
    Leask, Rhoda; Steyl, Johan Christian Abraham (AOSIS OpenJournals, 2017-01-24)
    Although nasal masses are uncommon in sheep and may have several causes, including neoplasia and bacterial, fungal and viral infections, these lesions may lead to economic losses resulting from weight loss and even death. ...