What is the prevalence of chlamydial genitourinary infections (chlamydia) in the US?

Updated: Sep 25, 2018
  • Author: Shahab Qureshi, MD, FACP; Chief Editor: Michael Stuart Bronze, MD  more...
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Chlamydial infection is the most frequently reported infectious disease in the United States, and its prevalence is highest in persons aged 24 years or younger. [13] The annual incidence of C trachomatis genital infections was estimated to be 2.86 million cases in the United States in 2008. [14]

Sexually active female populations average chlamydial carriage rates of about 20%. Many patients are asymptomatic. The incidence is 2-3 times that of Neisseria gonorrhoeae.

The prevalence of chlamydia has been reported to be as high as 14% among African American females aged 18-26 years and 17% among females with a history of gonorrhea or chlamydia in the previous 12 months. In addition, approximately 100,000 neonates are exposed to chlamydiae annually. The 2007-2012 National Health and Nutrition Examination Survey (NHANES) indicates that an estimated 1.8 million persons aged 14-39 years in the United States have a genital chlamydial infection. [15]

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