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Mina Mohammadi, MPH
Office: (415) 252-3942


Bay Area Cryptosporidiosis Surveillance Project


The San Francisco Bay Area Cryptosporidiosis Surveillance Project is coordinated by the San Francisco Department of Public Health in cooperation with the San Francisco Public Utilities Commission (SFPUC), the California Emerging Infections Program, and local health departments. This is an active surveillance program, using phone, email, and fax to obtain reports of confirmed cryptosporidiosis from clinical laboratories serving patients in the counties served by the SFPUC: San Francisco, Alameda, San Mateo, Santa Clara, and Tuolumne. There are three main goals of the project:

Enhance reporting of human cases of cryptosporidiosis

Monitor trends over time

Detect increases in the number of reported cases or outbreaks early enough to allow timely investigation and possible intervention

The Cryptosporidiosis Surveillance Project endeavors to interview every case to determine their waterborne and other exposures so that we can rule-in or rule-out any waterborne cause. In addition to this specific work, the cryptosporidiosis project coordinator assists SFDPH Communicable Disease Control Unit with interviewing other reportable disease cases and assisting with outbreak investigation. This collaborative activity provides an opportunity to engage actively with other Communicable Disease Investigators and to ensure that any signals indicating potential for waterborne transmission are noticed.


No drinking-waterborne outbreaks of disease have been detected in San Francisco. However, the Cryptosporidiosis Surveillance Project was responsible for identifying and intervening to prevent wider spread of a recreational waterborne outbreak of Cryptosporidiosis in Santa Clara county in 2006.


The Cryptosporidiosis Surveillance Project produces Quarterly and Annual reports. Reports starting from 2004 are archived:

Cryptosporidiosis Surveillance Project Reports 2020-2021 (pdf).

Cryptosporidiosis Surveillance Project Reports 2018-2019 (pdf).

Cryptosporidiosis Surveillance Project Reports 2014-2016 (pdf).

Cryptosporidiosis Surveillance Project Reports 2004-2013 (pdf)


The Centers for Disease Control maintains a page with links to publications, data and statistics relevant to Cryptosporidium.