Texas health officials are investigating whether a surgery technician implicated in a hepatitis C scare in Colorado may have spread the disease while she worked at a Houston-area hospital during 2005 and 2006. A spokesperson for the Texas health department said the agency is trying to determine whether Kristen Diane Parker had hepatitis C while she worked at Christus St. John Hospital in Nassau Bay. Parker admitted that she stole syringes containing a narcotic painkiller from Denver’s Rose Medical Center and replaced them with used syringes containing saline.