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Reasons for Chlamydia trachomatis testing and the associated age-specific prevalences
J K Møller1, B Andersen, F Olesen
1Department of Clinical Microbiology, Aarhus University Hospital, Denmark.
Scandinavian Journal of Clinical and Laboratory Investigation
|November 6, 2003
Summary
Chlamydia trachomatis infection screening is most effective in asymptomatic individuals under 30. Current testing practices in older women are less efficient, suggesting a shift towards universal screening for younger populations to optimize resource allocation.
Area of Science:
- Public Health
- Infectious Diseases
- Epidemiology
Background:
- Chlamydia trachomatis is a common sexually transmitted infection.
- Effective screening strategies are crucial for early detection and prevention of complications.
- Understanding age- and sex-specific prevalence based on testing indications is key to optimizing screening programs.
Purpose of the Study:
- To assess the age- and sex-specific prevalence of Chlamydia trachomatis infection.
- To identify populations that would benefit most from universal screening.
- To evaluate the efficiency of current testing indications and identify potential resource reallocation for targeted screening.
Main Methods:
- Data collected from 11,423 individuals tested for C. trachomatis in Aarhus County, Denmark.
- Testing indications included: infected partner, planned transcervical procedure, symptoms, or routine testing.
- Samples analyzed using Ligase Chain Reaction (LCR).
Main Results:
- Highest C. trachomatis prevalence (7.2%) was observed in the 16-20 years age group.
- 25% of tests were in asymptomatic women over 30 with low prevalence (1.3%).
- Men had a higher risk of infection (5.8% vs 1.7%) when tested as partners, despite women comprising the majority of tests.
Conclusions:
- Screening asymptomatic individuals under 30 years of age is justified by C. trachomatis prevalence.
- Current screening of asymptomatic women over 30 is resource-intensive with low yield.
- Reallocating resources from opportunistic screening of older women to systematic universal screening of younger individuals is recommended.