Trends in the prevalence of chlamydial infections: the impact of community-wide testing

Article Abstract:

Expanded efforts to screen women for chlamydia have had moderate effects in reducing the rates of chlamydia infections. The prevalence of chlamydia infections in various age and racial populations were compared at 50 clinics between 1989 and 1992. Overall, chlamydia infection rates decreased by 33% during this time period. Chlamydia infection rates were highest among black teenaged females at the beginning of the study period. However, the prevalence of chlamydia in this group decreased by only 19%, despite testing 42% of the black female aged 15 to 19 years. The prevalence of chlamydia among young pregnant women did not change.

Usage, Diagnosis, Prevention, Medical screening, Health screening, Chlamydia

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Chlamydia positivity versus prevalence: what's the difference?

Article Abstract:

The percentage of positive tests for chlamydia at sexually transmitted disease clinics appears to accurately indicate the prevalence of chlamydia infection in the clinic patient populations. Prevalence describes the number of people infected, while positivity is the number of test results that indicate the presence of disease. Repeated testing of an infected patient would increase the percentage of tests that are positive. Researchers examined 880,069 chlamydia tests over 9 years and found that positivity statistics and disease prevalence statistics only varied by 0.5%.

Analysis, Statistics, Epidemiology, Prevalence studies (Epidemiology)

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A pilot study of the prevalence of chlamydial infection in a national household survey

Article Abstract:

There appears to be enough Chlamydia trachomatis genital infections in the US to justify a national disease prevalence survey. Chlamydia can cause pelvic inflammatory disease, pain, and infertility in women. Researchers tested 1,144 people for the condition, and found that 7% of blacks, 3% of Mexican-Americans, and 2% of whites were infected. Women were consistently infected at higher rates than men, and the infection was most common among 15-19 year old women.

Sexually transmitted diseases, Demographic aspects

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