Objectives: To study Chlamydia trachomatis seroprevalence trends and geographical distribution over time in Finland.
Material and Methods: First pregnancy serum samples were retrieved from Finnish Maternity Cohort serum bank for the subcohort of 8.000 women stratified by calendar years (1983-1989, 1990-1996, 1997-2003) and age at time of sample withdrawal (14-22 and 23-28 years). C. trachomatis antibodies were determined using standard MOMP peptide ELISA. The spatio-temporal variation of C. trachomatis seroprevalence rates was visualized by a series of maps.
Results: A decreasing C. trachomatis seroprevalence trend from 1983 to 2003 was seen for both among under 23 years of age (20.8% to 10.6%) and among 23-28-year-old women (19.1% to 12.5%). Constant clusters were seen around the largest cities and in eastern Finland although the seroprevalence rates were generally decreasing throughout the country.
Conclusions: Only a few population-based serologic studies have been undertaken about C. trachomatis epidemiology over time. In Finland the seroprevalence of C. trachomatis is decreasing all over the country, albeit with small clusters remaining.
- Chlamydial antibody
- sexually transmitted diseases
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