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Disease Information

Cryptosporidiosis (often called "crypto") is a diarrheal disease caused by a one-celled parasite called Cryptosporidium parvum. Few people had heard of crypto until 1993, when over 400,000 people in Milwaukee, Wisconsin, became ill after their drinking water became contaminated with the parasite. Large outbreaks and isolated cases of crypto have been identified in Oregon as well. This has focused attention on determining and reducing the risk for cryptosporidiosis from community and municipal water supplies.

For persons with suppressed immune systems, for example persons with AIDS, some cancers, or recent organ transplants, the infection may persist indefinitely, and symptoms may be more severe.

What is cryptosporidium? (pdf)

Disease Reporting

What is required?

Health care providers and clinical laboratories

Health care providers and clinical laboratories are required by law to report cases and suspect cases of cryptosporidiosis to local health departments within one working day of identification.

Cases are subject to restriction on school and day-care attendance, food handling, and patient care for the duration of any diarrhea and/or vomiting.

For Tribal and Local Public Health Authorities


Once you click on the Tableau link, you will be able to select your disease of interest.

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