Statistics about Chlamydia

Prevalence and incidence statistics for Chlamydia:

See also prevalence and incidence page for Chlamydia

Incidence (annual) of Chlamydia: estimated 4 million cases (NIAID/CDC) [4-8 million cases] including undiagnosed (about 600,000 diagnosed).

Incidence Rate: approx 1 in 68 or 1.47% or 4 million people in USA [about data]

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. Note: this extrapolation calculation uses the incidence statistic: estimated 4 million cases (NIAID/CDC) [4-8 million cases] including undiagnosed (about 600,000 diagnosed).

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)

Undiagnosed prevalence rate: approx 1 in 80 or 1.25% or 3.4 million people in USA [about data]

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)

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)

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 statistics about 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)
• Estimated 1 in 20 women of reproductive age in the US (The National Women’s Health Information Center, CDC)
• 50% likelihood of infection by the time women reach 30 in the US (The National Women’s Health Information Center, CDC)
• 2 million people currently infected in America (Tracking The Hidden Epidemics, CDC, 2002)
• more about prevalence...»

Incidence statistics about 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)
• 30,763 new cases of chlamydia in England and Wales 2001(PHLS, London, 2002)
• 108% increase in chlamydia incidence in England and Wales 1996-2001 (PHLS, London, 2002)
• 3 million new cases annually in America (Tracking The Hidden Epidemics, CDC, 2002)
• 702,093 reported cases of chlamydia in the US 2000 (The National Women’s Health Information Center, CDC)
• 257.5 reported cases of chlamydia per 100,000 in the US 2000 (The National Women’s Health Information Center, CDC)
• 3 million new cases annually in America (Tracking The Hidden Epidemics, CDC, 2002)
• 702,093 reported cases in the US 2000 (The National Women’s Health Information Center, CDC)
• 257.5 reported cases per 100,000 in the US 2000 (The National Women’s Health Information Center, CDC)
• 12.3 new cases of chlamydial infection per 100,000 population was notified in Australia 2002 (Yohannes K, Roche P, Blumer C et al. 2004, Australia’s Health 2004, AIHW)
• 24.039 new cases of chlamydial infection was notified in Australia 2002 (Yohannes K, Roche P, Blumer C et al. 2004, Australia’s Health 2004, AIHW)
• more about incidence...»

Death statistics for Chlamydia:

The following are statistics from various sources about 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 about deaths...»

Society statistics for Chlamydia

  Costs for Chlamydia: more than $2 billion

  Costs for Chlamydia: The annual cost of chlamydia and its consequences in the United States is more than $2 billion. (Source: excerpt from Chlamydia in the US: DSTD)

About statistics:

This page presents a variety of statistics about Chlamydia. The term 'prevalence' of Chlamydia usually refers to the estimated population of people who are managing Chlamydia at any given time. The term 'incidence' of Chlamydia refers to the annual diagnosis rate, or the number of new cases of Chlamydia diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

Footnotes: 1. Reader's Digest, February 2004, "10 Diseases Doctors Miss", page 120
2. Notifiable Diseases Online, PPHB, Canada, 2000

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