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Am. J. Trop. Med. Hyg., 68(3), 2003, pp. 299-300
Copyright © 2003 by The American Society of Tropical Medicine and Hygiene

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SHORT REPORT: VARIATION IN THE 56-KD TYPE-SPECIFIC ANTIGEN GENE OF ORIENTIA TSUTSUGAMUSHI ISOLATED FROM PATIENTS IN THAILAND

THOMAS M. KOLLARS, JR., DHARADIDA BODHIDATTA, DUANGPORN PHULSUKSOMBATI, BOURSARAPORN TIPPAYACHAI, AND RUSSELL E. COLEMAN
Entomological Sciences Program, United States Army Center for Health Promotion and Preventive Medicine, Aberdeen Proving Ground, Maryland; Department of Biochemistry, and Department of Pathology, Division of Research, Royal Thai Army Component, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand; Department of Entomology, United States Army Medical Component, Armed Forces Research Institute of Medical Sciences, Bangkok, Thailand

 

ABSTRACT

The sequences of a 300-base pair region of the 56-kD type-specific antigen gene from 12 Orientia tsutsugamushi isolates from Thailand were compared with isolates from other regions in Asia. A high degree of heterogeneity was found among the 12 Thai isolates, with the C3 strain most commonly found. The abundance of the C3 strain of O. tsutsugamushi is of particular concern because doxycycline and chloramphenicol resistance have previously been reported in this strain.

Received March 4, 2002. Accepted for publication May 1, 2002.

Financial support: This work was supported by funds from the U.S. Army Medical Research and Material Command and the Royal Thai Army.

Disclaimer: The views of the authors do not purport to represent the position of the Department of the Army or the Department of Defense.

Authors’ addresses: Thomas M. Kollars, Jr., Entomological Sciences Program, United States Army Center for Health Promotion and Preventive Medicine, Aberdeen Proving Ground, MD 21010. Dharadida Bodhidatta, Department of Biochemistry, Division of Research, Royal Thai Army Component, Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand. Duangporn Phulsuksombati, Department of Pathology, Division of Research, Royal Thai Army Component, Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand. Boursaraporn Tippayachai and Russell E. Coleman, Department of Entomology, United States Army Medical Component, Armed Forces Research Institute of Medical Sciences, Bangkok 10400, Thailand.






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Copyright © 2003 by the American Society of Tropical Medicine and Hygiene.