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Low prevalence of the new variant of Chlamydia trachomatis in Denmark
  1. H Westh1,
  2. J S Jensen2
  1. 1
    Department of Clinical Microbiology, Hvidovre Hospital, Hvidovre, Denmark
  2. 2
    Department of Bacteriology, Mycology, and Parasitology, Statens Serum Institute, Copenhagen, Denmark
  1. Henrik Westh, Department of Clinical Microbiology 445, Hvidovre Hospital, Kettegård Alle 30, DK-2650 Hvidovre, Denmark; henrik.westh{at}


We estimated the prevalence of the new variant of Chlamydia trachomatis in Denmark. Fifty consecutive C trachomatis urine samples from each of the 14 regional microbiology laboratories were initially tested and re-analysed with a real-time C trachomatis PCR assay targeting the 16S rRNA gene and with the Becton Dickinson ProbeTec with confirmation of positives with a plasmid PCR with the primers CTP200/CTP201 flanking the deletion. The positive rate for 691 samples was 17% by real-time C trachomatis PCR and by ProbeTec. One specimen was positive for the new variant of C trachomatis (0.14% of all samples; 0.8% of the positives). The prevalence of the new variant of C trachomatis is very low despite very close contact between Denmark and Sweden and extensive cross-border commuting.

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  • Funding: This study was in part financed through a grant from Becton Dickinson.

  • Competing interests: None.

  • Contributors: HW and JSJ contributed equally to the design of the study, data collection and analysis.