DETROIT (WKZO) -- A fifth metro Detroit hospital that once employed a New Hampshire health care worker charged with infecting at least 30 patients with Hepatitis C is alerting people to get tested.

David Kwiatkowski worked on a contingent basis in the radiology department at St. John Hospital and Medical Center in Detroit from July through September 2005.  Patients who received injectable painkillers for interventional radiology treatments during that time period should call the hospital to get tested.

Hospital officials say they have no evidence that Kwiatkowski had hepatitis C when he worked there.