Browsing 2002 Onderstepoort Journal of Veterinary Research, Volume 69, 2002 by Type "Article"

Browsing 2002 Onderstepoort Journal of Veterinary Research, Volume 69, 2002 by Type "Article"

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  • Acaricide resistance profiles of single- and multi-host ticks from communal and commercial farming areas in the Eastern Cape and North-West Provinces of South Africa 
    Horak, Ivan Gerard; Mekonnen, Sileshi; Bryson, N.R.; Fourie, L.J.; Peter, R.J.; Spickett, Arthur M.; Taylor, Robin J.; Strydom, T.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    A field study (February 2000 to August 2001) was conducted on communal and commercial farms in the Eastern Cape and North-West Provinces of South Africa to detect the levels of tick resistance to commonly used acaricides. ...
  • Amphistome infection of goats farmed under resource-poor conditions in South Africa 
    Vatta, A.F.; Krecek, R.C.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    From December 1998 to April 2000, a longitudinal study was conducted of the pooled trematode faecal egg counts of samples collected from goats of resource-poor farmers at Rust de Winter, Gauteng Province, Impendle, ...
  • Animal-level risk factors for Trypanosoma evansi infection in camels in eastern and central parts of Kenya 
    Ngaira, J.M.; Bett, B.; Karanja, S.M.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Point prevalences and animal-level risk factors for Trypanosoma evansi infection were investigated in a cross-sectional study that involved 2227 camels from eastern and central parts of Kenya. The screening tests used were ...
  • Apparent prevalence of dourine in the Khomas region of Namibia 
    Kumba, F.F.; Claasen, B.; Petrus, P.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    A 15-year record of the results of horse sera from the Khomas region of Namibia tested by the complement fixation test for dourine at the Central Veterinary Laboratory in Windhoek before clearing the respective animals for ...
  • Author index 
    Anonymous; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
  • The classification of seven serotypes of equine encephalosis virus and the prevalence of homologous antibody in horses in South Africa 
    Howell, P.G.; Bosman, Anna-Mari; Coetzer, Jacobus A.W.; Guthrie, Alan John; Groenewald, Daleen; Visage, Carina W.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Selected isolates of equine encephalosis virus were shown to have comparable viral protein profiles and to represent seven distinct serotypes, based on cross-neutralization tests. Serotype-specific virus-neutralizing ...
  • Continuous exposure to an aversive mixture as a means of maintaining aversion to vermeerbos (Geigeria ornativa O. Hoffm.) in the presence of non-averted sheep 
    Snyman, Leendert D.; Schultz, R.A. (Rowena Anitra); Kellerman, T. Stephanus; 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., 2002)
    Continuous exposure to an aversive mixture was investigated as a means of maintaining aversion to vermeerbos in sheep subjected to the social influence of non-averted sheep. The use of an aversive mixture was based on a ...
  • Description of Pelonia africana n. g., n. sp. (Pentastomida: Sebekidae) from the lungs of Pelomedusa subrufa and Pelusios sinuatus (Chelonia) in South Africa 
    Boomker, Jacob Diederik Frederik; Junker, Kerstin; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    The terrapins Pelomedusa subrufa and Pelusios sinuatus taken from a water reservoir in the Northern Province, South Africa, were examined for pentastome infections. Two immature specimens, a patent female and a mature male, ...
  • Development of a diagnostic one-tube RT-PCR for the detection of Rift Valley fever virus 
    Nel, Louis Hendrik; Espach, Anel; Romito, M.; Viljoen, G.J.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Diagnosis of Rift Valley fever (RVF) is based on serology and virus isolation. The disadvantages of the former include poor sensitivity, high cost, risks associated with using infectious virus as antigen, the lengthy ...
  • Development of solid phase antigen for indirect ELISA for the detection of specific antibody responses to infection with Newcastle disease virus 
    Sahle, M.; Burgess, G.W.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    A simple and inexpensive method of antigen preparation by ultrafiltration was investigated using the V4 strain of Newcastle disease virus. The antigen designated XM300 was used in an indirect enzyme-linked immunosorbent ...
  • The effect of three bufadienolide cardiac glycosides on contraction of isolated rat jejunum 
    Botha, C.J. (Christoffel Jacobus); Gehring, Ronette; Van Rooyen, J.M.; Venter, D.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Three cardiac glycosides were screened for pharmacological effects on isolated rat jejunum. The contraction of rat jejunum with epoxyscillirosidin, a non-cumulative bufadienolide, and cotyledoside and tyledoside D, both ...
  • Effects of the scab mite Psoroptes ovis on the haematology and live mass of Merino and Dorper sheep 
    Horak, Ivan Gerard; Meintjes, T.; Fourie, L.J.; Boomker, Jacob Diederik Frederik (Pretoria : Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Five Merino and five Dorper sheep were artificially infested with the sheep scab mite Psoroptes ovis and the effect of infestation on their haematology, serum protein levels and live mass recorded for a period of 14 weeks. ...
  • Freezing of sheep faeces invalidates Haemonchus contortus faecal egg counts by the McMaster technique 
    Van Wyk, Jan Aucamp; Van Wyk, Laetitia; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Faecal pellets from a sheep that was artificially infected with a monoculture of Haemonchus contortus were collected over a 2-h period in the morning. In the laboratory the faeces were thoroughly mixed by hand and 48 by 1 ...
  • The gamma-interferon test: its usefulness in a bovine tuberculosis survey in African buffaloes ( Syncerus caffer) in the Kruger National Park 
    Michel, Anita Luise; Grobler, D.G.; De Klerk, L.M.; Bengis, Roy G.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    A survey to determine the bovine tuberculosis status of buffalo herds north of the Olifants River in the Kruger National Park was conducted, using a new diagnostic approach. Diagnosis of Mycobacterium bovis infection was ...
  • Hepatic and renal concentrations of copper and other trace elements in hippopotami (Hippopotamus amphibius L.) living in and adjacent to the Kafue and Luangwa Rivers in Zambia 
    Mwase, M.; Almli, B.; Sivertsen, T.; Musonda, M.M.; Flaoyen, A.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Hepatic and renal concentrations of the elements arsenic, cadmium, cobalt, copper, lead, manganese, mercury, molybdenum, selenium and zinc were studied in samples collected from hippopotami from the Kafue River in the Kafue ...
  • Hosts, seasonal occurrence and life cycle of Rhipicentor nuttalli (Acari: Ixodidae) 
    Horak, Ivan Gerard; Fourie, L.J.; Kok, D.J.; Van Zyl, W.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    There are only two species worldwide within the genus Rhipicentor, namely Rhipicentor bicornis and Rhipicentor nuttalli, and both occur only in Africa. Rhipicentor nuttalli has a widespread distribution in South Africa and ...
  • In vitro isolation of equine piroplasms derived from Cape Mountain zebra (Equus zebra zebra) in South Africa 
    Zweygarth, Erich; Meyer, P.; Lopez-Rebollar, Laura M.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Twenty blood samples of zebras ( Equus zebra zebra) from the Karoo National Park and the Bontebok National Park in South Africa, all seropositive for Theileria equi, were subjected to in vitro culture to identify carrier ...
  • Isolation of serovar C-3 Haemophilus paragallinarum from Zimbabwe: a further indication of the need for the production of vaccines against infectious coryza containing local isolates of H. paragallinarum 
    Bragg, R.R. (Robert Richard); Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    Various isolates of Haemophilus paragallinarum, collected from a severe outbreak of infectious coryza in poultry from Zimbabwe, were serotyped and were found to belong to serovar C-3. Previously, isolates were serotyped ...
  • The Kumm isolate of Ehrlichia ruminantium: in vitro isolation, propagation and characterization 
    Zweygarth, Erich; Van Heerden, Henriette; Allsopp, Basil A.; Josemans, A.I.; Van Strijp, M.F.; Allsopp, M.T.E.P.; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    An effective culture system for Ehrlichia (Cowdria) ruminantium comb. nov. was first established in 1985 and many stocks were subsequently isolated and propagated in vitro. A notable exception, however, was the Kumm isolate ...
  • Multiplication of the V4 strain of Newcastle disease virus in Madin Derby bovine kidney cells 
    Sahle, M.; Burgess, W.G.; Kidanemariam, Awoke; Boomker, Jacob Diederik Frederik (Published jointly by the Agricultural Research Council, ARC-Onderstepoort Veterinary Institute and the Faculty of Veterinary Science, University of Pretoria., 2002)
    This study describes a reproducible cell culture system that permits the growth and secondary multiplication of the V4 strain of Newcastle disease virus. Allantoic fluid, magnesium chloride and diethylaminoethyl dextran ...