Volume 45, Issue 2
  • ISSN: 0002-9637
  • E-ISSN: 1476-1645



Recent epidemiologic data suggests that , the cause of Queensland tick typhus, is present in southeastern Australia. In order to further confirm this observation, a canine serosurvey was undertaken to determine if naturally occurring antibodies were present in pet and farm dogs from this newly-recognized endemic area. Thirty-five of 312 surveyed dogs (11.2%) had indirect immunofluorescent antibody titers of 1:64 or greater against antigen. Positive control sera were obtained from two dogs experimentally inoculated with . One of these dogs was serially sampled and a rickettsemia could not be documented. None of 26 control sera obtained from dogs from South Australia, New Zealand, western Victoria, or North Carolina had antibody titers ≥ 1:64. These results suggest that spotted fever group rickettsiae are present in Southeastern Australia.


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