The distribution of heartwater in the highveld of Zimbabwe, 1980-1997

Show simple item record Peter, T.F. Perry, B.D. (Brian D.), 1946- O'Callaghan, C.J. Medley, G.F. Shumba, W. Madzima, W. Burridge, M.J. Mahan, S.M.
dc.contributor.editor Verwoerd, Daniel Wynand 2012-11-06T06:50:31Z 2012-11-06T06:50:31Z 2012 1998
dc.description The articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat X Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format. en
dc.description.abstract Heartwater, the tick-borne disease caused by the rickettsia Cowdria ruminantium has historically been confined to the southern and western lowvelds of Zimbabwe. Since 1986, however, cases of heartwater have been diagnosed with increasing frequency in the central and eastern regions of the previously heartwater-free highveld plateau. During the same period, collections of the two major tick vectors of heartwater in Zimbabwe, Amblyomma hebraeum and Amblyomma variegatum, were made for the first time in these areas, suggesting that spread of these ticks was responsible for the changed distribution of the disease. The factors associated with this spread have not been determined, but increased cattle and wildlife movement and reduced intensity of dipping undoubtedly play important roles. Currently, the distribution of heartwater and its vectors in the highveld is still largely restricted to the central and eastern regions. The northern regions of the highveld appear to be predominantly uninfected, though it is likely that, eventually, heartwater will spread further with considerable impact on livestock production in Zimbabwe. en
dc.description.librarian mn2012 en
dc.description.sponsorship United States Agency tor International Development. en
dc.identifier.citation Peter, TF, Perry, BD, O'Callaghan, CJ, Medley, GF, Shumba, W, Madzima, W, Burridge, MJ & Mahan, SM 1998, 'The distribution of heartwater in the highveld of Zimbabwe, 1980-1997’. Onderstepoort Journal of Veterinary Research, vol. 65, no. 3, pp. 177-187. en
dc.identifier.issn 0330-2465
dc.language.iso en en
dc.publisher Published by the Agricultural Research Council, Onderstepoort Veterinary Institute en
dc.rights © ARC-Onderstepoort (original). © University of Pretoria. Dept of Library Services (digital). en
dc.subject Veterinary medicine en
dc.subject Amblyomma hebraeum en
dc.subject Amblyomma variegatum en
dc.subject Heartwater en
dc.subject Spread en
dc.subject Zimbabwe en
dc.subject.lcsh Veterinary medicine -- South Africa
dc.subject.lcsh Heartwater -- South Africa en
dc.title The distribution of heartwater in the highveld of Zimbabwe, 1980-1997 en
dc.type Article en

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