Prevalence and Incidence of Chlamydia

Incidence (annual) of Chlamydia:

estimated 4 million cases (NIAID/CDC) [4-8 million cases] including undiagnosed (about 600,000 diagnosed). ... see also overview of Chlamydia.

Incidence Rate:

approx 1 in 68 or 1.47% or 4 million people in USA [Source statistic for calcuation: "estimated 4 million cases (NIAID/CDC) [4-8 million cases] including undiagnosed (about 600,000 diagnosed)." -- see also general information about data sources]

Incidence extrapolations for USA for Chlamydia:

4,000,000 per year, 333,333 per month, 76,923 per week, 10,958 per day, 456 per hour, 7 per minute, 0 per second. [Source statistic for calculation: "estimated 4 million cases (NIAID/CDC) [4-8 million cases] including undiagnosed (about 600,000 diagnosed)." -- see also general information about data sources]

Undiagnosed prevalence of Chlamydia:

estimated 3.4 million cases (based in NIAID/CDC estimates with only about 600,000 to 800,000 reported from 4 million cases) ... see also misdiagnosis of Chlamydia.

Undiagnosed prevalence rate:

approx 1 in 80 or 1.25% or 3.4 million people in USA [about data] ... Note: this rate calculation uses the following statistic: estimated 3.4 million cases (based in NIAID/CDC estimates with only about 600,000 to 800,000 reported from 4 million cases)

Prevalance of Chlamydia:

Though 526,653 cases were reported in 1997, an estimated 3 million cases occur annually. (Source: excerpt from Chlamydia in the US: DSTD) ... In 1997, 526,653 chlamydial infections were reported to the CDC, a case rate of 207 per 100,000 population. (Source: excerpt from Sexually Transmitted Diseases Statistics, NIAID Fact Sheet: NIAID)

Worldwide prevalence of Chlamydia:

Worldwide, an estimated 89 million new chlamydial infections occurred in 1997. (Source: excerpt from Sexually Transmitted Diseases Statistics, NIAID Fact Sheet: NIAID)

Prevelance of Chlamydia discussion:

How are adolescents and young women affected?

• As many as 1 in 10 adolescent girls tested for chlamydia is infected.

• Based on reports to CDC provided by states that collect age-specific data, teenage girls have the highest rates of chlamydial infection. In these states, 15- to 19-year-old girls represent 46% of infections and 20- to 24-year-old women represent another 33%. These high percentages are consistent with high rates of other STDs among teenagers.

• Among women entering the Job Corps in 1997, chlamydia rates ranged from 4 - 14% by state (20,000 entrants are screened annually). Chlamydial infection is widespread geographically and highly prevalent among these economically disadvantaged young women between 16 and 24 years old.

Incidence of Chlamydia:

This infection is now the most common of all bacterial STDs, with an estimated 4 to 8 million new cases occurring each year. (Source: excerpt from Sexually Transmitted Diseases, NIAID Fact Sheet: NIAID)

Prevelance statistics for Chlamydia:

The following statistics relate to the prevalence of Chlamydia:

• 2 million people currently affected (CDC)
• 9.51% of female Army recruits in a study by Charlotte Gaydos as reported by Reader's Digest¹
• 2 million people currently infected in America (Tracking The Hidden Epidemics, CDC, 2002)
• Estimated 2 million cases in the USA 2002 (Trends in STD’s in the US, CDC, 2002)
• Estimated 1 in 10 adolescent girls in the US (The National Women’s Health Information Center, CDC)
• more statistics...»

Incidence statistics for Chlamydia:

The following statistics relate to the incidence of Chlamydia:

• 607,602 reported cases (1998)
• Estimated 3 million annual cases including undiagnosed cases (CDC)
• 656,721 annual cases notified in USA 1999 (MMWR 1999)
• 150.74 per 100,000 in Canada 2000²
• Estimated 3 million new cases each year (including undiagnosed) in the USA 2002 (Trends in STD’s in the US, CDC, 2002)
• 702,093 new cases of Chlamydia occurred annually in the US 2000 (Health, United States: 2002, NCHS, CDC)
• more statistics...»

Death statistics for Chlamydia:

The following statistics relate to deaths and Chlamydia:

• Chlamydia death statistics for various regions worldwide:
  • About 1,000 deaths from Chlamydia in Africa 2002 (The World Health Report, WHO, 2004)
  • About 8,000 deaths from Chlamydia in South East Asia 2002 (The World Health Report, WHO, 2004)
  • About 1,000 deaths from Chlamydia in Eastern Mediterranean 2002 (The World Health Report, WHO, 2004)
• more statistics...»

More Statistics about Chlamydia:

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