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Prevalence Trends of the New Variant of Chlamydia trachomatis in Four Counties of Sweden in 2007–2011

Herrmann, Björn PhD*; Eden, Desirée MSc*; Hadad, Ronza MSc; Christerson, Linus PhD*; Loré, Britta MSc; Österlund, Anders MD, PhD§; Larsson, Inger MSc; Sylvan, Staffan MD, PhD; Fredlund, Hans MD, PhD; Unemo, Magnus PhD

doi: 10.1097/OLQ.0b013e3182593be7

A new variant of Chlamydia trachomatis (nvCT) was discovered in Sweden in 2006, and it could not be detected by diagnostic systems from Abbott and Roche, whereas the third system used, from Becton Dickinson (BD), detects nvCT. We analyzed 3648 samples from 2 counties that used Roche and 2 counties that used BD methods from 2007 to 2011. After implementation of a Roche method that detects nvCT, its proportion has decreased and converged in the 4 counties but are still at different levels in Roche and BD counties. Future studies are needed to see if nvCT will decline further.

From the *Section of Clinical Bacteriology, Department of Medical Sciences, Uppsala University, Uppsala, Sweden; WHO Collaborating Centre for Gonorrhoea and other STIs, Örebro University Hospital, Örebro, Sweden; Department of Clinical Microbiology, Falu Lasarett, Falun, Sweden; §Communicable Disease Prevention and Control, Sunderby Hospital, Luleå, Sweden; Department of Clinical Microbiology, Sunderby Hospital, Luleå, Sweden; and Department of Communicable Diseases Control and Prevention, Uppsala County Council, Uppsala, Sweden

The authors thank Dr. Carin Anagrius for critically reading and commenting the manuscript.

Supported by local funds at the Uppsala University Hospital and at Örebro University Hospital and from the Uppsala-Örebro Regional Research Council.

All authors declare that they have no conflicts of interest.

Correspondence: Björn Herrmann, PhD, Department of Clinical Microbiology, Uppsala University Hospital, Dag Hammarskjöldsväg 17, SE-75185 Uppsala, Sweden. E-mail:

Received for publication January 10, 2012, and accepted April 5, 2012.

© Copyright 2012 American Sexually Transmitted Diseases Association