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Volume 13, Number 4—April 2007

Research

Flinders Island Spotted Fever Rickettsioses Caused by “marmionii” Strain of Rickettsia honei, Eastern Australia

Nathan B. Unsworth*, John Stenos*Comments to Author , Stephen R. Graves*, Antony G. Faa†, G. Erika Cox‡, John R. Dyer§, Craig S. Boutlis¶, Amanda M. Lane#, Matthew D. Shaw#, Jennifer Robson**, and Michael D. Nissen††
Author affiliations: *Australian Rickettsial Reference Laboratory, Geelong, Victoria, Australia; †Warwick Hospital (Southern Downs Health Services District), Warwick, Queensland, Australia; ‡Launceston General Hospital, Launceston, Tasmania, Australia; §Fremantle Hospital, Fremantle, Western Australia, Australia; ¶Menzies School of Health Research, Darwin, Northern Territory, Australia; #University of Queensland, Brisbane, Queensland, Australia; **Sullivan Nicolaides Pathology, Brisbane, Queensland, Australia; ††Royal Brisbane Hospital, Brisbane, Queensland, Australia

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Table 1

Rickettsial serology, PCR, and culture results from 7 cases of FISF*

1st serum sample 2nd serum sample Microbial detection of FISF agent by
Case
Location
Day after disease onset
SFG titer
TG titer
Day after disease onset
SFG titer
TG titer
Seropositivity
Seroconversion
PCR
Culture
1 Port Wilunga; SA 14 128 <128 190 256 <128 + + +
2 Darnley Is; QLD 8 256 <128 186 512 <128 + + +
3 Darnley Is; QLD 3 <128 <128 179 <128 <128 + +
4 Yam Is; QLD 5 <128 <128 515 <128 <128 + +
5 Innisfail; QLD 7 <128 <128 17 4,096 2,048 + + + +
6 Launceston, TAS 34 256 128 60 256 128 + +†
7 Iron Range; QLD 5 <128 <128 18 1,024 <128 + + +‡ ND

*FISF, Flinders Island spotted fever; SFG, spotted fever group; TG, typhus group; SA, Is, island; South Australia; QLD, Queensland, TAS, Tasmania; ND: Not done.
†PCR positive at both 34 and 60 d after disease onset.
Performed on serum and real-time PCR positive only.

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