The new variant of Chlamydia trachomatis was present as early as 2003 in Orebro County, Sweden, but remained undetected until 2006.

Abstract:

OBJECTIVES:In 2006, a new variant of Chlamydia trachomatis (nvCT) was reported in Sweden. Because of a cryptic plasmid deletion, the nvCT was undetectable in several of the genetic diagnostic systems used worldwide at the time. This study aimed to evaluate whether the nvCT was present in specimens obtained from patients attending the outpatient sexually transmitted infection (STI) clinic at Örebro University Hospital, Örebro, Sweden already in 2002-2003. METHODS:In 2012, archival (-20 °C freezer) urogenital specimens (2002 (n=1083) and in 2003 (n=1143)) obtained from men (2002 (n=398) and 2003 (n=486)) and women (2002 (n=301) and 2003 (n=408)) were analysed with Cobas TaqMan CT test V.2.0. All C trachomatis positive specimens were subsequently examined using a duplex PCR assay that simultaneously detects the deletion on the nvCT cryptic plasmid and the ompA gene of C trachomatis genotype E. RESULTS:In total, 68 patients (9.7%) in 2002 and 61 (6.8%) in 2003 were C trachomatis positive. The duplex PCR assay identified 26 C trachomatis genotype E positive patients in 2002 (38%) and 25 in 2003 (41%). No nvCT was found in 2002, but one specimen obtained from a 23-year-old man in June 2003 was positive for the nvCT. CONCLUSIONS:The nvCT was present as early as 2003 in Örebro County, Sweden, which concurs with previously reported statistical estimations of its emergence. Accordingly, the nvCT spread undetected for at least 3 years, explaining the high proportion (38%) in Örebro County when it was first detected in late 2006.

journal_name

Sex Transm Infect

authors

Jurstrand M,Fredlund H,Unemo M

doi

10.1136/sextrans-2013-051018

subject

Has Abstract

pub_date

2013-11-01 00:00:00

pages

607-8

issue

7

eissn

1368-4973

issn

1472-3263

pii

sextrans-2013-051018

journal_volume

89

pub_type

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