Prevalence and Incidence of Cryptosporiosis

Cryptosporiosis: Rare Disease

Cryptosporiosis is listed as a "rare disease" by the Office of Rare Diseases (ORD) of the National Institutes of Health (NIH). This means that Cryptosporiosis, or a subtype of Cryptosporiosis, affects less than 200,000 people in the US population.

Ophanet, who are a consortium of European partners, currently defines a condition rare when if affects 1 person per 2,000. They list Cryptosporiosis as a "rare disease". More information about Cryptosporiosis is available from Orphanet

Incidence (annual) of Cryptosporiosis:

2,361 annual cases notified in USA 1999 (MMWR 1999) ... see also overview of Cryptosporiosis.

Incidence Rate:

approx 1 in 115,205 or 0.00% or 2,360 people in USA [Source statistic for calcuation: "2,361 annual cases notified in USA 1999 (MMWR 1999)" -- see also general information about data sources]

Incidence extrapolations for USA for Cryptosporiosis:

2,360 per year, 196 per month, 45 per week, 6 per day, 0 per hour, 0 per minute, 0 per second. [Source statistic for calculation: "2,361 annual cases notified in USA 1999 (MMWR 1999)" -- see also general information about data sources]

Undiagnosed prevalence of Cryptosporiosis:

0.5 to 2 million undiagnosed cases each year ... see also misdiagnosis of Cryptosporiosis.

Undiagnosed prevalence rate:

approx 1 in 544 or 0.18% or 500,000 people in USA [about data] ... Note: this rate calculation uses the following statistic: 0.5 to 2 million undiagnosed cases each year

Incidence statistics for Cryptosporiosis:

The following statistics relate to the incidence of Cryptosporiosis:

• 2.62 per 100,000 in Canada 2000¹
• 16.6 new cases of cryptosporidiosis per 100,000 population was notified in Australia 2002 (Yohannes K, Roche P, Blumer C et al. 2004, Australia’s Health 2004, AIHW)
• 3,255 new cases of cryptosporidiosis was notified in Australia 2002 (Yohannes K, Roche P, Blumer C et al. 2004, Australia’s Health 2004, AIHW)
• more statistics...»

About prevalence and incidence statistics:

The term 'prevalence' of Cryptosporiosis usually refers to the estimated population of people who are managing Cryptosporiosis at any given time. The term 'incidence' of Cryptosporiosis refers to the annual diagnosis rate, or the number of new cases of Cryptosporiosis 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. Notifiable Diseases Online, PPHB, Canada, 2000

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