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Volume 10, Number 5—May 2004

Research

Acute Tick-borne Rickettsiosis Caused by Rickettsia heilongjiangensis in the Russian Far East

Oleg Y. Mediannikov*†‡Comments to Author , Yuri Sidelnikov†, Leonid Ivanov§, Eugenia Mokretsova†, Pierre-Edouard Fournier‡, Irina Tarasevich*, and Didier Raoult‡
Author affiliations: *Gamaleya Research Institute of Epidemiology and Microbiology, Moscow, Russia; †Far Eastern State Medical University, Khabarovsk, Russia; ‡Université de la Méditerranée, Marseille, France; §Khabarovsk Plague Control Station of Ministry of Health of Russian Federation, Khabarovsk, Russia

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Table 2

Serologic data of 11 patients with Rickettsia infectiona,b

Patient no. Disease onset date Antimicrobial treatmentc PCR
 Sera Collection date IgM tests
gltA gene ompA and ompB genes R. heilongjiangensis R. hulinensis R. sibirica R. conorii
1 6/18 6/23 + NI 1 6/24 0 0 0 0
2 6/28 1/32 1/32 1/32 1/32
2 6/20 6/23 + + 1 6/24 0 0 0 0
2 7/9 0 0 0 0
3 6/21 6/24 + NI 1 6/5 0 0 0 0
2 7/12 0 0 0 0
4 6/22 6/26 + NI 1 6/26 1/32 1/16 1/16 1/32
2 7/1 1/64 1/64 1/64 1/64
5 6/22 6/28 + NI 1 6/28 0 0 0 0
2 7/16 1/128 1/32 1/32 1/128
6 6/29 7/2 + + 1 7/3 0 0 0 0
2 7/8 1/64 1/64 1/64 1/64
7 6/30 7/4 + NI 1 7/5 0 0 0 0
2 7/16 1/1,024 1/1,024 1/256 1/1,024
8 7/1 7/8 + NI 1 7/8 0 0 0 0
2 7/26 1/512 1/126 1/126 1/512
9 7/6 7/12 + NI 1 7/15 1/64 1/64 1/64 1/64
2 7/31 1/128 1/128 1/128 1/128
10 7/23 7/28 + + 1 7/29 0 0 0 0
2 8/13 1/32 1/32 1/16 1/16
11 7/25 8/1 + NI 1 8/2 1/256 1/256 1/64 1/64
2 8/15 1/256 1/256 1/64 1/64

aPCR, polymerase chain reaction; Ig, immunoglobulin; NI, not investigated.
bIgM tests used.
cDate of beginning of antimicrobial drug therapy.

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