The immunity in heartwater

Show simple item record Neitz, W.O.
dc.contributor.editor Du Toit, P.J. 2016-07-12T14:33:45Z 2016-07-12T14:33:45Z 2016 1939
dc.description The articles have been scanned in colour with a HP Scanjet 5590: 300dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format. en_ZA
dc.description.abstract The experiments here described were undertaken in order to determine (a) the duration in sheep of immunity to heartwater and whether immunologically different strains exist, and (b) how the immunity is maintained. Among ten strains from different parts of South Africa no immunological difference was observed. During the observation a new virus was encountered to which the name " virus A " was given. The mortality from this virus was less than 2 % and it appeared to be harboured by some of the passage sheep. Unlike the causal agent of heartwater, this virus produces a mild reaction in horses. The duration of immunity was solid in all cases up to six months and in varying periods up to 58 months after recovery. In a few cases from 7-84 months after recovery, febrile reactions due to the test injection occurred. It is suggested that these partially immune animals may act as main-tainers of heartwater in treks where fully susceptible animals are absent. Splenectomy in recovered cases did not cause a relapse of heartwater. Rickettsia ruminantium could not be demonstrated in recovered sheep at periods longer than 60 days after inoculation
dc.identifier.citation Neitz, WO 1939, 'The immunity in heartwater'. Onderstepoort Journal of Veterinary Science and Animal Industry, vol. 13, no. 2, pp. 245-283 en_ZA
dc.identifier.issn 0330-2465
dc.language.iso en en_ZA
dc.publisher Pretoria : The Government Printer en_ZA
dc.rights © ARC – Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). © University of Pretoria. Department of Library Services (digital). en_ZA
dc.subject Heartwater en_ZA
dc.subject.lcsh Veterinary medicine -- South Africa
dc.title The immunity in heartwater en_ZA
dc.type Article en_ZA

Files in this item

This item appears in the following Collection(s)

Show simple item record