Fifty cases of cyclosporiasis (infection with Cyclospora cayetanensis) from around the state have been reported to the California Department of Public Health (CDPH) in patients who have not traveled outside the US. As of July 9, one case was reported to the Alameda County Department of Public Health (ACPHD) and none to the City of Berkeley Public Health Division. The low number could be due to under-detection of this infection, which requires special testing methods. The common source is not known at this time, although prior outbreaks in the US have been associated with imported fresh produce items. To read the joint Alameda County and Berkeley public health advisory, go to http://www.acphd.org/health-alerts.aspx.