The serological relationship between Cowdria ruminantium and certain members of the genus Ehrlichia

dc.contributor.authorHeartwater : Past, Present and Future. Workshop (1986 : Kruger National Park, South Africa)
dc.contributor.authorHolland, C.J.
dc.contributor.authorLogan, L.L.
dc.contributor.authorMebus, C.A.
dc.contributor.authorRistic, M.
dc.contributor.editorBigalke, R.D.
dc.date.accessioned2014-11-19T10:28:20Z
dc.date.available2014-11-19T10:28:20Z
dc.date.created2014
dc.date.issued1987
dc.descriptionThe articles have been scanned in colour with a HP Scanjet 5590; 600dpi. Adobe Acrobat XI Pro was used to OCR the text and also for the merging and conversion to the final presentation PDF-format.en_US
dc.description.abstractAlthough Cowdria ruminantium has been classified within the tribe Ehrlichia of the family Rickettsiaceae, there has been no extensive study conducted regarding its antigenic relationship to members of the genus Ehrlichia, or other rickettsial agents. The recent establishment of a method by one of us (L. L. Logan) for obtaining C. ruminantium antigens from primary neutrophil cultures for use in a serological test has enabled the comparison of 4 isolates of C. ruminantium with 4 Ehrlichia spp. , 9 Rickettsia spp., 2 Rochalimaea spp., Coxiella burnetii and Anaplasma marginate. Using the respective IFA test antigens, all 4 isolates of C. ruminantium were shown to cross-react very strongly with Ehrlichia equi, causative agent of equine ehrlichiosis in the United States and Europe and, to a lesser degree, with Ehrlichia canis, the aetiological agent of canine ehrlichiosis. No relationship was found between C. ruminantium and E. risticii, E. sennetsu, Rickettsia spp., Coxiella burnetii or Anaplasma marginate. The strong association between C. ruminantium and E. equi, with respect to host-cell predilection (neutrophils), morphology and serological cross-reactivity is of major scientific and epidemiological importance, especially since E. equi has been experimentally shown to infect sheep and goats. The morphological and host similarity between C. ruminantium, E. equi and two additional members of the genus Ehrlichia. E. phagocytophilia and E. ondiri. leads us to suspect that all 4 agents may be antigenically related.en_US
dc.description.librarianlmchunu2014en_US
dc.description.librarianmn2014
dc.identifier.citationHolland, CJ, Logan, LL, Mebus, CA & Ristic, M 1987, ' The serological relationship between Cowdria ruminantium and certain members of the genus Ehrlichia’, Onderstepoort Journal of Veterinary Research, vol. 54, no. 3, pp. 331.en_US
dc.identifier.issn0330-2465
dc.identifier.urihttp://hdl.handle.net/2263/42668
dc.language.isoenen_US
dc.publisherPublished by the Government Printer, Pretoria.en_US
dc.rights©ARC - Onderstepoort and Faculty of Veterinary Science, University of Pretoria (original). ©University of Pretoria. Dept. of Library Services (digital).en_US
dc.subjectVeterinary medicineen_US
dc.subject.lcshVeterinary medicine -- South Africa
dc.subject.lcshHeartwater -- South Africaen
dc.titleThe serological relationship between Cowdria ruminantium and certain members of the genus Ehrlichiaen_US
dc.title.alternativeHeartwater : past, present and future : proceedings of a workshop held at Berg en Dal, Kruger National Park, on 8-16 September 1986
dc.typeArticleen_US

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