Browsing South African National Veterinary Repository by Author "De Vos, Valerius"

Browsing South African National Veterinary Repository by Author "De Vos, Valerius"

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  • The antibiotic sensitivity patterns of Bacillus anthracis isolated from the Kruger National Park 
    Odendaal, M.W.; Pieterson, P.M.; De Vos, Valerius; Botha, A.D.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)
    Forty-four isolates of Bacillus anthracis made from carcasses and soil in different localities of an endemic anthrax area in the Kruger National Park, South Africa, were tested by standard disc diffusion for their ...
  • The biochemical, morphological and virulence profiles of Bacillus anthracis isolated in the Kruger National Park 
    Odendaal, M.W.; Pieterson, P.M.; De Vos, Valerius; Botha, A.D.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute., 1991)
    The biochemical, morphological and virulence profiles of 44 Bacillus anthracis isolates, obtained from various localities and carcass remains of wild animals in the Kruger National Park, South Africa, were examined. The ...
  • A description of the immature stages of Kirkioestrus minutus (Rodhain & Bequaert, 1915) (Diptera : oestridae), and the life cycle and seasonal prevalence of this fly in blue wildebeest 
    Horak, Ivan Gerard; De Vos, Valerius; Boomker, Jacob Diederik Frederik; 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. (Pretoria : Government Printer., 1980)
    Descriptions of the 1st, 2nd and 3rd instar larvae and the puparium of Kirkioestrus minutus are given. First instar larvae, which have not previously been described, can be distinguished from other oestrid larvae by the ...
  • Detection of AHV-1 DNA in lung sections from blue wildebeest (Connochaetes taurinus) calves by in situ hybridization 
    Michel, Anita Luise; Van der Lugt, Jaco J.; Bengis, Roy G.; De Vos, Valerius; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    In situ hybridization was performed on formalin-fixed, paraffin-embedded lung sections from eight blue wildebeest (Connochaetes taurinus) calves to investigate the role of this organ in the excretion of alcelaphine herpes ...
  • Distribution of endocrine cells in the gut of the impala (Aepyceros melampus) 
    Schoeman, J.H.; De Vos, Valerius; Van Aswegen, G.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1998)
    Immunocytochemical methods were employed to demonstrate endocrine cells, containing peptides and serotonin, in the gut of the impala. Cells immunoreactive to serotonin, somatostatin, gastrin, cholecystokinin, glucagon, ...
  • The epidemiology of tuberculosis in free-ranging African buffalo (Syncerus caffer) in the Kruger National Park, South Africa 
    Michel, Anita Luise; De Vos, Valerius; Bengis, Roy G.; Kriek, N.P.J.; Keet, D.F.; Raath, J.P.; Huchzermeyer, Hildegard F.A.K.; 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)
    The presence of bovine tuberculosis ( Mycobacterium bovis) in the Kruger National Park (KNP) was determined for the first time in 1990. It was diagnosed in an African buffalo ( Syncerus caffer) bull, which was found recumbent ...
  • Excretion of alcelaphine herpesvirus-1 by captive and free-living wildebeest (Connochaetes taurinus) 
    Barnard, B.J.H.; Bengis, Roy G.; Griessel, M.D.; De Vos, Valerius; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1989)
    Excretion of alcelaphine herpesvirus-1 (AHV-1) is for all practical purposes limited to wildebeest calves under the age of 4 months. Sixty-one per cent of calves 1-2 months of age excreted virus with a mean titre of 9,8 x ...
  • Feeding habits and flight-range of blow-flies (Chrysomyia spp.) in relation to anthrax transmission in the Kruger National Park, South Afnca 
    Braack, L.E.O.; De Vos, Valerius; Verwoerd, Daniel Wynand (Published by the Government Printer, Pretoria., 1990)
    Carrion-frequenting blow-flies (Chrysomyia albiceps and C. marginalis) were allowed 4 days of feeding on ³²P-orthophosphate-labelled blood or an Impala carcass (Aepyceros melampus) in the northern Kruger National Park, ...
  • Foot-and-mouth disease and the African buffalo (Syncerus caffer) : 1. Carriers as a source of infection for cattle 
    Thomson, G.R. (Gavin); Bengis, Roy G.; Hedger, R.S.; Pini, Attilio; De Vos, Valerius; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1986)
    Ten pregnant buffalo cows, six of which were subsequently shown to be carriers of SAT 1, 2 and 3 viruses, were captured in the Kruger National Park (KNP) and allowed to calve in captivity. The buffalo cows and calves were ...
  • Haemonchus contortus from the vaal ribbok, Pelea capreolus, and the bontebok, Damaliscus dorcas dorcas, in the Bontebok National Park 
    Boomker, Jacob Diederik Frederik; Horak, Ivan Gerard; Gibbons, Lynda M.; De Vos, Valerius; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1983)
    During a survey of the parasites of antelope in the Bontebok National Park, Swellendam, Cape Province, specimens of Haemonchus contortus with exceptionally long spicules were recovered from 5 out of 8 bontebok, Damaliscus ...
  • Helminth and arthropod parasites of blesbok, Damaliscus dorcas phillipsi, and of bontebok, Damaliscus dorcas dorcas. 
    Horak, Ivan Gerard; Brown, Moira R.; Boomker, Jacob Diederik Frederik; De Vos, Valerius; Van Zyl, Elsa A.; 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)
    The helminth burdens of 8 blesbok shot in the north-eastern Orange Free State, 8 from the eastern Cape Province, 28 from the eastern Transvaal and 3 from the central Transvaal were determined. In addition, the arthropod ...
  • Helminth and arthropod parasites of springbok, Antidorcas marsupialis, in the Transvaal and western Cape Province 
    Horak, Ivan Gerard; Meltzer, David George Anton; De Vos, Valerius; 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)
    The helminth burdens of 17 springbok from 2 localities in the Transvaal and of 4 springbok from the western Cape Province were determined. Eight of the animals from the Transvaal and the 4 from the Cape Province were also ...
  • Helminth and arthropod parasites of vaal ribbok, Pelea capreolus, in the western Cape Province 
    Horak, Ivan Gerard; De Vos, Valerius; De Klerk, B.D.; 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)
    Five vaal ribbok, culled in the Bontebok National Park during December 1979, were examined for helminth and arthropod parasites. Two nematode species, a louse and 2 tick species were recovered and there was also evidence ...
  • The helminth parasites of various artiodactylids from some South African nature reserves 
    Boomker, Jacob Diederik Frederik; Horak, Ivan Gerard; De Vos, Valerius; Bigalke, R.D. (Published by the Government Printer, Pretoria., 1986)
    The helminth species composition and helminth burdens of 4 grey duikers, 12 bushbuck, 2 nyala, 2 giraffe, a steenbok, an oribi, a waterbuck and a tsessebe from the Kruger National Park (KNP); of a steenbok and a greater ...
  • The intestine and endocrine pancreas of the African elephant: a histological, immunocytochemical and immunofluorescence study 
    Van Aswegen, G.; De Vos, Valerius; Schoeman, J.H.; Van Noorden, Susan; Kotze, Sanet H.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Histological, immunocytochemical and immunofluorescence methods were employed to study the intestine and endocrine pancreas of the elephant. The histological findings were in line with those in monogastric mammals. In ...
  • The ixodid tick burdens of various large ruminant species in South African nature reserves 
    Horak, Ivan Gerard; Boomker, Jacob Diederik Frederik; Potgieter, F.T.; Walker, Jane B.; De Vos, Valerius; Bigalke, R.D. (Published by The Government Printer, Pretoria, 1983)
    The ixodid tick burdens of eland (Taurotragus oryx), greater kudu (Tragelaphus strepsiceros), nyala (Tragelaphus angasi), bushbuck (Tragelaphus scriptus) and giraffe (Giraffa camelopardalis) in the Kruger National Park, ...
  • Nasal acariasis in the chacma baboon, Papio ursinus Kerr, 1972 
    McConnell, E.E.; Basson, P.A.; De Vos, Valerius; South Africa. Dept. of Agricultural Technical Services; De Lange, M.; Reinecke, R.K.; Walker, Jane B.; De Kock, V.E.; Howell, P.G. (Pretoria : Government Printer, 1971)
    Mature specimens of Rhinophaga papionis Fain, 1955 were observed exclusively in the maxillary recesses of 29 of 31 chacma baboons (93,6%). They stimulated the formation of inflammatory polyps, which in some cases almost ...
  • Observations on naturally acquired hepatozoonosis of wild carnivores and dogs in the Republic of South Africa 
    Young, E.; De Vos, Valerius; Bigalke, R.D.; Basson, P.A.; McCully, R.M.; De Kock, V.E.; Bigalke, R.D.; Cameron, Colin McKenzie; Verster, Anna J,M.; Walker, Jane B. (Published by The Government Printer, Pretoria, 1975)
    Hepatozoonosis was studied in hyaenas, lions, jackals, cheetahs and one leopard in the Kruger National Park and compared with the condition seen in dogs in the Republic of South Africa. Hepatozoon schizonts were found in ...
  • The oesophagus and stomach of the African elephant : a histological, immunocytochemical and immunofluorescence study 
    Van Aswegen, G.; Schoeman, J.H.; De Vos, Valerius; Van Noorden, Susan; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1994)
    Histological, immunocytochemical and immunofluorescence methods were employed to study the oesophagus and stomach of the elephant. The histological findings were in line with the situation in monogastric species like ...
  • Oocysts of Isospora papionis in the skeletal muscles of chacma baboons 
    McConnell, E.E.; Basson, P.A.; Thomas, Shan E.; De Vos, Valerius; De Kock, V.E.; De Lange, M.; Bigalke, R.D.; Howell, P.G.; Reinecke, R.K.; Walker, Jane B. (Published by the Government Printer, Pretoria, 1972)
    Numerous partially and fully sporulated oocysts of Isospora papionis were found in the skeletal muscles of two free-ranging adult male chacma baboons (Papio ursinus). Only one of them had I. papionis oocysts in the intestines ...