State health officials said Friday a patient at Audubon Surgery Center in Colorado Springs may have contracted the blood-borne liver disease from 26-year-old Kristen Diane Parker.
Prosecutors have already linked 19 hepatitis C cases found at Denver's Rose Medical Center to Parker. She faces multiple charges of tampering and fraudulently obtaining a controlled substance. Parker also worked at hospitals in Mount Kisco, N.Y., and Houston, where health officials have launched investigations.
"We're sorry to see any positive case come forward from Audubon," said state health department spokesman Mark Salley. "We kind of hoped that the employee would have changed her ways."
Justin Graf, one of Parker's attorneys, said they were working with the U.S. Attorney's Office and couldn't comment on the latest test results or a 42-count federal grand jury indictment handed up Thursday.
Parker faces up to life in prison if she is convicted of tampering and a person she infected dies, prosecutors said. More charges are possible.
Parker is accused of stealing the syringes from operating room carts, then replaced them with dirty ones filled with saline.
Parker's work at four hospitals in three states is now under scrutiny.
Officials say up to 6,000 patients at the two Colorado hospitals may have been exposed to the disease. Thousands of former patients have been tested, with 1,818 negative results from Rose and 894 from Audubon, Colorado health officials said Friday. Parker worked at Rose from Oct. 21 to April 13 and at Audubon from May 4 until June 29.
An additional 2,800 patients may have been exposed at Northern Westchester Hospital in Mount Kisco, N.Y., where Parker worked between October 2007 and February 2008. The hospital sent letters to patients advising them to get tested.