Browsing 2000 Onderstepoort Journal of Veterinary Research, Volume 67, 2000 by Subject "Cattle -- Diseases"

Browsing 2000 Onderstepoort Journal of Veterinary Research, Volume 67, 2000 by Subject "Cattle -- Diseases"

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  • Bovine borreliosis in Botswana 
    Sharma, S.P.; Amanfu, W.; Losho, T.C.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)
    Clinical Borrelia theileri infection was reported for the first time in cattle from Botswana concurrent with Babesia bovis and Theileria mutans infections. Two animals, an ox and a cow of the Tswana breed demonstrated ...
  • The effect of a natural maedi-visna virus infection on the productivity of South African sheep 
    Bath, Gareth F.; Verwoerd, Daniel Wynand; Dungu, B.; Vorster, J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)
    A cohort study was conducted in order to measure the effect of the chronic indurative lymphocytic mastitis caused by the South African strain of maedi visna virus (MVV) on the pre-weaning growth of lambs born ...
  • Evaluation of a commercially available ELISA kit for detection of antibodies to Anaplasma marginale and Anaplasma centrale in cattle in Australia and Zimbabwe 
    Bowles, P.M.; Molloy, J.B.; Blight, G.W.; Singh, S.; Mabikacheche, L.G.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)
    A newly available competitive inhibition ELISA kit for the serological diagnosis of anaplasmosis was evaluated in Australia and Zimbabwe. In Australia the performance of the test was compared with the card agglutination ...
  • Models for regional heartwater epidemiology in a variable environment 
    Levins, R.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)
    A model of the epidemic dynamics of heartwater within a cattle production unit was presented by Yonow et al. (1998). Here, the model is expanded to a region consisting of several farms to study the effect of environmental ...
  • Parameters for the determination and evaluation of heat stress in dairy cattle in South Africa 
    Du Preez, J.H.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)
    Not all parameters are trustworthy and practical to use as parameters to determine heat stress in dairy cattle. The temperature-humidity index (THI) is still the best, simplest and most practical index (parameter) for ...
  • The role of parasitic diseases as causes of mortality in cattle in a high potential area of central Kenya: a quantitative analysis 
    Kanyari, P.W.N.; Kagira, J.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)
    Postmortem records of cattle brought to the Veterinary School in Kabete near Nairobi were examined for a period of 15 years (1984-1998, inclusive) in order to establish the role that parasitic diseases played as causes of ...
  • Suspected sheep-associated malignant catarrhal fever in a zero-grazed dairy herd in Kenya 
    Mulei, C.M.; Gathumbi, P.K.; Mbuthia, P.G.; Verwoerd, Daniel Wynand (Published by the Agricultural Research Council, Onderstepoort Veterinary Institute ., 2000)
    An outbreak of a disease characterised by very high mortality occurred in a group of nine calves (1-4 months old) in a zero-grazing unit 2-3 weeks after an introduction of an apparently healthy alien sheep into the calf ...