Sexually Transmitted Diseases

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Sexually Transmitted Diseases:
Article

Genotyping of Chlamydia trachomatis Would Improve Contact Tracing

FALK, LARS MD*; LINDBERG, MARGRET MSc*; JURSTRAND, MARGARETHA MSc†; BÄCKMAN, ANDERS PhD†; OLCÉN, PER MD, PhD†; FREDLUND, HANS MD, PhD†

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Abstract

Background: The reported number of genital Chlamydia trachomatis infections has increased 15% annually since 1997 in Sweden. Inaccurate partner notification might be one reason.

Goal: The goals were to determine if genotyping of C trachomatis would improve partner notification and to study the duration of infection.

Study Design: Sexual networks were constructed. C trachomatis isolates from 231 individuals attending the Örebro STD clinic during 1 year were typed by sequencing of the omp1 gene.

Results: All individuals were traced and diagnoses were established in 30 of 161 networks. More than one genotype was seen in seven networks. The mean duration of C trachomatis infection in each network was calculated to be 23 weeks.

Conclusion: Genotyping could be a useful tool in partner notification when there are discrepant or uncommon genotypes. Limited clinic catchment areas create information difficulties that obstruct accurate contact tracing.

© Copyright 2003 American Sexually Transmitted Diseases Association

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