Two months of testing has identified a rare strain of hepatitis C in the blood of some patients treated at Utah hospitals by a nurse who was later found to have the disease, state health officials said Wednesday. Health officials began free testing in October after it was discovered the nurse, who was fired in 2014 after stealing drugs, may have exposed as many as 7,200 patients to hepatitis C genotype 2b, while working at Ogden's McKay-Dee Hospital, and Davis Hospital and Medical Center in Layton, between 2012 and 2014.