Browsing 1997 Onderstepoort Journal of Veterinary Research, Volume 64, 1997 by Issue Date

Browsing 1997 Onderstepoort Journal of Veterinary Research, Volume 64, 1997 by Issue Date

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  • Experimental infection of vaccinated slaughter ostriches with virulent Newcastle disease virus 
    Verwoerd, Daniel Wynand; Gerdes, Gertruida Hermanna; Olivier, A.; Williams, R.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    A virulent Newcastle disease virus (NDV) isolate from an outbreak in commercial poultry, with virulence indices of MDT = 47-48 h; IVPI = 2,17 and ICPI = 1,8; was used to inoculate 10x vaccinated (standard poultry vaccines) ...
  • Some factors governing the entry of Culicoides spp. (Diptera: Ceratopogonidae) into stables 
    Barnard, B.J.H.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    The entry of Culicoides species into stables was examined by comparing the numbers of midges caught with identical light-traps under different conditions. The comparison was made between collections made inside an empty ...
  • Cryopreservation of third-stage larvae of Strongylus vulgaris (large strongyle of horses) 
    Titoy, G.A.P.; Van Rensburg, L.J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    A technique for the cryopreservation of third-stage larvae of Strongylus vulgaris is described. Infective larvae of S. vulgaris were exsheathed in a 0,16% sodium hypochlorite solution and then transferred into cryotubes ...
  • Krimpsiekte, associated with thalamic lesions, induced by the neurotoxic cardiac glycoside, cotyledoside, isolated from Tylecodon wallichii (Harv.) Toelken subsp. wallichii 
    Vleggaar, Robert; Botha, C.J. (Christoffel Jacobus); Van der Lugt, Jaco J.; Erasmus, G.L.; Kellerman, T. Stephanus; Schultz, R.A. (Rowena Anitra); Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    The specific neurotoxic principle of Tylecodon wallichii (Harv.) Toelken subsp. wallichii, the cause of krimpsiekte in small stock, was isolated and identified as the previously described cumulative bufadienolide, cotyledoside. ...
  • Obituary: Dr Max Sterne 
    Verwoerd, Daniel Wynand; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    This volume of the journal is dedicated to Max Sterne in recognition of his contributions to veterinary bacteriology.
  • The structure of the interstitial tissue of the active and resting avian testis 
    Aire, Tom A.; Verwoerd, Daniel Wynand (Pretoria : Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    The interstitial tissue of the testis was studied in gonadally active and gonadally inactive domestic fowl (Gallus gallus domesticus), guinea-fowl (Numida meleagris), duck (Anas platyrhynchos) and Japanese quail (Coturnix ...
  • The endocrine pancreas of the Cape fur seal, Arctocephalus pusillus (Schreber, 1776): an immunocytochemical study 
    Erasmus, C.P.; Van Aswegen, G.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    The indirect peroxidase method was employed to study the endocrine pancreas of the Cape fur seal. Immunoreactivity to insulin was confined to the cores of the islets and the insulin cells were more abundant than the other ...
  • Evaluation of a 3 ml heartwater (cowdriosis) infective blood vaccine dose 
    Combrink, M.P.; De Waal, D.T.; Troskie, P.C.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    Three milliliters of blood from the present commercially produced heartwater infective blood vaccine (Ball3 stock) was experimentally tested in sheep and cattle for infectivity and efficacy. Results obtained for this ...
  • Comparison of ELISA and HI for detection of antibodies against Wesselsbron disease virus 
    Williams, R.; Schoeman, M.; Van Wyk, A.; Roos, K.; Josemans, E.J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    A two-graph Receiver Operating Characteristic analysis was done to determine the optimal cut-off value of an indirect enzyme-linked immunosorbent assay (ELISA) for detection of antibodies to Wesselsbron disease (WSL) virus. ...
  • Canine visceral leishmaniosis: first case in Zambia 
    Matsukawa, K.; Chiti, L.; Yoshima, M.; Sayer, P.D.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    Visceral leishmaniosis was discovered in a male 12- year-old Australian cattle dog in September 1994. Canine leishmaniosis has not previously been reported in Zambia.
  • Failure to establish chronic infection of the reproductive tract of the male horse with a South African asinine strain of equine arteritis virus (EAV) 
    Paweska, Janusz Tadeusz; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    Eight sexually mature horse stallions were inoculated intranasally with a South African asinine strain of EAV, a strain that was isolated from the semen of a donkey carrier. All horses developed fever, with maximum rectal ...
  • Escherichia coli serotypes in pigs in South Africa 
    Henton, Marijke M.; Engelbrecht, M.M.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    This retrospective study was based on 674 cases of colibacillosis in pigs submitted to the diagnostic bacteriology laboratory of the Onderstepoort Veterinary Institute (OVI) over the 20-year period ranging from 1971-1991. ...
  • Schistosoma mattheei infection in cattle: the course of the intestinal syndrome, and an estimate of the lethal dose of cercariae 
    Van Wyk, Jan Aucamp; Van Rensburg, L.J.; Heitmann, L.P.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    Three groups of young oxen were infected percutaneously with cercariae of Schistosoma mattheei. Three of five oxen infected with 248 cercariae/kg mass died or were killed in extremis 58-70 d after infection, a fourth ...
  • Guide for authors 
    Anonymous; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
  • Ulcerative pododermatitis in free-ranging African elephant (Loxodonta africana) in the Kruger National Park 
    Keet, D.F.; Grobler, D.G.; Raath, J.P.; Gouws, J.; Carstens, J.; Nesbit, J.W.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    The occurrence of severe lameness in adult African elephant bulls in a shrub Mopane (Colophospermum mopane) ecosystem was investigated. Large ulcers in the soles of at least one front foot were seen in each of the recorded ...
  • Aspects of rabies epidemiology in Tsumkwe District, Namibia 
    Laurenson, K.; Esterhuysen, J.; Stander, P.; Van Heerden, J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    Aspects of rabies epidemiology were investigated in the Tsumkwe District, Namibia, during December 1993 and January 1994. A cross-sectional seroepidemiological survey for rabies antibodies was carried out in domestic (n = ...
  • Prevalence of equine piroplasmosis in Central Mongolia 
    Avarzed, A.; De Waal, D.T.; Igarashi, I.; Saito, A.; Oyamada, T.; Toyoda, Y.; Suzuki, N.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    Antigen for the indirect fluorescent antibody test (IFAT) was routinely prepared from infected erythrocytes from horses experimentally infected with Babesia equi and Babesia caballi. With the successful establishment of ...
  • Cryopreservation of sheathed third-stage larvae of Oesophagostomum radiatum (nodular worm of cattle) 
    Titoy, G.A.P.; Van Rensburg, L.J.; Van Strijp, M.F.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    Sheathed infective larvae of Oesophagostomum radiatum were successfully cryopreserved by the use of a procedure developed for hookworms. The survival rate, as assessed by motility, was 57,9% after 42 d of cryopreservation.
  • Acceptance of candidate baits by domestic dogs for delivery of oral rabies vaccines 
    Linhart, S.B.; Baer, G.M.; Balderas Torres, J.M.; Engeman, R.M.; Collins, E.F.; Meslin, F.X.; Schumacher, C.L.; El-Taweel, A.H.; Wlodkowski, J.C.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    Protocols for evaluating oral rabies vaccine baits for domestic dogs were field tested in central Mexico, after which dog-food manufacturers and suppliers to the pet-food industry were advised as to potential ingredients ...
  • Parasites of South African wildlife. XV. Helminths of scrub hares, Lepus saxatilis in the Kruger National Park 
    Boomker, Jacob Diederik Frederik; Horak, Ivan Gerard; Booyse, Dirk G.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1997)
    A total of 145 scrub hares from three localities in the Kruger National Park were examined for helminths: 124 at Skukuza, 15 at Shingwedzi, and three each at Pretoriuskop and Pafuri. Trichostrongylus deflexus was the most ...