An actress who works in Southern California's pornography industry has tested positive for HIV, renewing county and state health officials' concerns that the adult entertainment industry lacks sufficient safety measures to prevent the spread of AIDS and other sexually transmitted diseases.

The new case was confirmed to The Times and pornography industry websites Wednesday by the Adult Industry Medical Healthcare Foundation, a San Fernando Valley-based clinic that serves adult-film stars in Sherman Oaks and Granada Hills. Public health officials, however, said no official report had been made at the state or county level.

The Adult Industry Medical Healthcare Foundation said Wednesday that initial HIV tests of the woman's partners have come up negative, but they are not being allowed to perform and are being encouraged to test again in two weeks.

The case is the first publicly confirmed HIV infection in the industry in Southern California since 2004 when an HIV outbreak shut down porn production for a month.

County Public Health Director Dr. Jonathan Fielding says his office received no reports about the incident by Wednesday afternoon but would launch an investigation.