New Jersey health officials are trying to unravel how 15 dialysis patients at an Atlantic City hospital have contracted hepatitis C since 2005. Hospital administrators at AtlantiCare Regional Medical Center City Campus contacted the state after discovering five new hepatitis C cases during federally required annual hepatitis C testing of all dialysis patients. The testing, in late March and early April, showed the five patients had become positive for the disease since starting dialysis treatment at the hospital.