DENVER -- Another hepatitis C case has been linked to a Denver hospital where an infected surgery technician is accused of swapping her dirty syringes for ones filled with a powerful painkiller meant for patients.

Colorado health officials said Friday 11 cases are now linked to Rose Medical Center, where 26-year-old Kristen Diane Parker worked from October to April.

Some 4,700 patients are Rose Medical Center have been told about the possible infection. Of those, 1,250 have tested negative. Eleven positive cases have been linked to Parker but four other positive cases are not tied to Parker.

Parker also worked at Audubon Surgery Center in Colorado Springs from May until her arrest in June. Some 900 former surgery patients at Audubon have been tested, but so far, of the 500 cases tested, no hepatitis cases there have been linked to Parker.

About 6,000 patients had surgeries performed at one of the facilities during the time Parker may have exposed surgical patients to hepatitis C, the Colorado Department of Public Health and Environment reported Friday.

Parker is jailed on federal tampering and drug-related charges. Investigations are also under way at hospitals in New York and Texas, where Parker also worked.

The state health department said it will release a weekly summary of hepatitis C cases every Friday.