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15 March 2005

Volume 191, Number 6
The Journal of Infectious Diseases 2005;191:917–923
0022-1899/2005/19106-0013$15.00
DOI: 10.1086/428290
MAJOR ARTICLE

Evaluation of Antimicrobial Resistance and Treatment Failures for Chlamydia trachomatis: A Meeting Report

Susan A. Wang,1

John R. Papp,1

Walter E. Stamm,2

Rosanna W. Peeling,4

David H. Martin,3 and

King K. Holmes2

1Centers for Disease Control and Prevention, Atlanta, Georgia; 2University of Washington, Seattle; 3Louisiana State University Medical Center, New Orleans; 4World Health Organization, Geneva, Switzerland

Each year, Chlamydia trachomatis causes 3 million new infections and results in more than $1 billion in medical costs in the United States. Repeat or persistent infection occurs in 10%–15% of women who are treated for C. trachomatis infection. However, the role played by antimicrobial resistance in C. trachomatis treatment failures or persistent infection is unclear. With researchers in the field, we reviewed current knowledge and available approaches for evaluating antimicrobial resistance and potential clinical treatment failures for C. trachomatis. We identified key research questions that require further investigation. To date, there have been no reports of clinical C. trachomatis isolates displaying in vitro homotypic resistance to antimicrobials, but in vitro heterotypic resistance in C. trachomatis has been described. Correlation between the results of existing in vitro antimicrobial susceptibility tests and clinical outcome after treatment for C. trachomatis infection is unknown. Animal models may provide insight into chlamydial persistence, since homotypic resistance against tetracycline has been described for Chlamydia suis in pigs. Evaluating C. trachomatis clinical treatment failures, interpreting laboratory findings, and correlating the 2 clearly remain extremely challenging undertakings.

Received 8 July 2004; accepted 14 October 2004; electronically published 11 February 2005.

Reprints or correspondence: Dr. Susan A. Wang, National Center for Infectious Diseases, Centers for Disease Control and Prevention, Mailstop G‐37, 1600 Clifton Rd. NE, Atlanta, GA 30333 ().

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  • The subject of this manuscript was discussed by the authors and other meeting participants (see meeting participant list in the Acknowledgments section) at the Chlamydia trachomatis Susceptibility Meeting in Atlanta, Georgia, which was convened and funded by the Centers for Disease Control and Prevention, on 30 October 2001. There were no other sources of funding for the meeting.

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