Browsing 1996 Onderstepoort Journal of Veterinary Research, Volume 63, 1996 by Issue Date

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Browsing 1996 Onderstepoort Journal of Veterinary Research, Volume 63, 1996 by Issue Date

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  • Distribution of viral antigen in tissues of new-born lambs infected with Rift Valley fever virus 
    Coetzer, Jacobus A.W.; Van der Lugt, Jaco J.; Smit, M.M.E.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    The distribution of Rift Valley fever (RVF) viral antigen was studied by immunohistochemistry in the liver, spleen, prescapular lymph node, lungs and kidneys of eight experimentally infected new-born lambs and in four ...
  • Experimentally induced chronic copper toxicity in cattle 
    Gummow, Bruce; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Eight Bonsmara bulls and eight Bonsmara heifers, having masses of between 210 and 266 kg when selected, were randomly allocated to four groups, each comprising two bulls and two heifers. Group 1 received 0,6 mg of copper ...
  • The comparative host status of red veld rats (Aethomys chrysophilus) and bushveld gerbils (Tatera leucogaster) for epifaunal arthropods in the southern Kruger National Park, South Africa 
    Braack, L.E.O.; Horak, Ivan Gerard; Jordaan, Leonora C.; Louw, J.P.; Segerman, Joyce; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Red veld rats (Aethomys chrysophilus) and bushveld gerbils (Tatera leucogaster) were trapped at monthly intervals, when possible, over a 2-year period, in the southern Kruger National Park, Mpumalanga Province. Forty-six ...
  • Heartwater in sheep and goats: a review 
    Yunker, Conrad E.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Heartwater (cowdriosis) is an important, often fatal , tick-borne disease of domestic and wild ruminants in sub-Saharan Africa and some Indian Ocean and Caribbean islands. The causal agent, Cowdria ruminantium (Cowdry ...
  • Macroscopic blood supply to the hypophysis and hypothalamus of the ostrich (Struthio camelus) 
    Groenewald, Hermanus B.; Elias, M.Z.J. (Mario Zefanias Joao); Bezuidenhout, A.J. (Abraham Johannes), 1942-; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    The branching pattern of the Aa. carotes internae and the macroscopic blood supply to the hypophysis and hypothalamus of the ostrich were studied on ten dissected acrylic vascular-injected heads and ten corrosion ...
  • Pathogenicity differences between South African isolates of Ornithobacterium rhinotracheale 
    Gummow, Bruce; Travers, A.F.; Coetzee, L.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Three selected South African Ornithobacterium rhinotracheale field isolates were identified and inoculated via the caudal abdominal airsac into 28-day-old broilers, which were monitored under controlled laboratory ...
  • Brucella melitensis biotype 1 outbreak in goats in northern KwaZulu-Natal 
    Reichel, R.; Nel, J.R.; Emslie, R.; Bishop, G.C.; Verwoerd, Daniel Wynand (Pretoria : Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Brucella melitensis biotype 1 was confirmed in indigenous, outbred goats in three northern districts of the KwaZulu-Natal province following the diagnosis of human Malta fever in the same area. Six foci of infection were ...
  • Theiler Memorial Trust Award 
    Anonymous; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
  • Effect of cyclophosphamide on the acquisition of resistance to infestation by Rhipicephalus appendiculatus in rabbits 
    Binta, M.G.; Mushi, E.Z.; Rurangirwa, F.R.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Parenteral administration of cyclophosphamide in rabbits made resistant to infestation by the tick Rhipicephalus appendiculatus, resulted in abrogation of the resistance phenomenon. As a result, a high percentage (83%) of ...
  • Radiolabelled adult Haemonchus contortus obtained from eggs voided in the faeces of a sheep injected with ⁵⁹Fe 
    Van Wyk, Jan Aucamp; Titoy, G.A.P.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    The infective larvae of Haemonchus contortus (L3) obtained from an artificially infected sheep injected with 125 µCi of ⁵⁹Fe, incorporated the isotope and retained it in sufficient quantities to be detectable by autoradiography ...
  • Author index 
    Verwoerd, Daniel Wynand (Pretoria : Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
  • The usefulness of faecal phosphorus and nitrogen in interpreting differences in live-mass gain and the response to P supplementation in grazing cattle in arid regions 
    Grant, C.C. (Catharina Cornelia); Biggs, H.C.; Meissner, H.H.; Basson, P.A.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    The average daily gains of heifers and oxen on commercial and experimental farms in Namibia were used to indicate production differences in several areas and at different rates of phosphorus and protein supplementation. ...
  • In vitro cultivation of Babesia occultans 
    Van Niekerk, C.J.; Zweygarth, Erich; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Babesia occultans, the causative agent of a benign form of cattle babesiosis in South Africa, was continuously cultivated in microaerophilous stationary-phase culture. A modified medium, 199, supplemented with either ...
  • Heterophile antibodies to chicken erythrocytes in sheep infected with Trypanosoma congolense 
    Joshua, R.A.; Neils, J.S.; Oladosu, L.A.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    High hemagglutinin titres against chicken erythrocytes were detected in the sera of Trypanosoma congolense-infected sheep. Adsorption of sheep sera with solubilized T. congolense resulted in marked reduction of hemagglutinin ...
  • Tuberculosis in buffaloes (Syncerus caffer) in the Kruger National Park: spread of the disease to other species 
    Penrith, Mary-Louise; Michel, Anita Luise; Keet, D.F.; Kriek, N.P.J.; Huchzermeyer, Hildegard F.A.K.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Tuberculosis, caused by Mycobacterium bovis, was recently diagnosed in a cheetah (Acinonyx jubatus) , two lions (Panthera leo) and a chacma baboon (Papio ursinus) from the Kruger National Park (KNP). It is assumed that ...
  • First report of field outbreaks of ergot-alkaloid toxicity in South Africa 
    Schneider, D.J.; Miles, Christopher O.; Garthwaite, I.; Van Halderen, A.; Wessels, J.C.; Lategan, H.J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Outbreaks of clinical disease caused by the ingestion of ergotized Lolium rigidum (annual ryegrass), which resulted in a substantial loss in production, have been reported. A number of outbreaks of a hyperthermia syndrome ...
  • Seasonal dynamics of the Karoo paralysis tick (Ixodes rubicundus): a comparative study on Merino and Dorper sheep 
    Fourie, L.J.; Kok, D.J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Karoo paralysis in South Africa is induced in livestock by feeding female Ixodes rubicundus ticks when infestation densities on hosts exceed certain critical levels. It has been shown previously that Angora goats are at a ...
  • Book review 
    Anonymous; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
  • The efficacy of amitraz against cattle ticks in Tanzania 
    Kagaruki, L.K.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    The efficacy of amitraz on cattle ticks was assessed by susceptibility tests, spraying and dipping trials. Tests on the susceptibility of three tick species, Rhipicephalus appendiculatus, Amblyomma variegatum and ...
  • The distribution, diagnoses and estimated economic impact of plant poisonings and mycotoxicoses in South Africa 
    Kellerman, T. Stephanus; Naude, T.W.; Fourie, Niel; Verwoerd, Daniel Wynand (Pretoria : Agricultural Research Council, Onderstepoort Veterinary Institute, 1996)
    Maps are provided showing the national and provincial distributions of many plant poisonings and mycotoxicoses in South Africa. The various poisonings are briefly described and criteria for their diagnoses are given. The ...