An adult film performer has tested positive for HIV, prompting a temporary shutdown of the billion-dollar porn industry in Los Angeles on Monday night.

Porn producers shut down the shoots in Southern California as the diagnosis is confirmed through retesting, an industry group told the media.

Free Speech Coalition Executive Director Diane Duke told the Los Angeles Times on Monday that her group became aware of the HIV case Saturday. She also told The Associated Press that a series of tests were being done on the performer to confirm the case before anyone the performer might have spread the illness to will be notified to get tested.

Duke doesn't know how long those series of tests will take, and she declined to release the name, age or gender of the performer said to be infected with the sexually transmitted disease.

Neither did Duke tell the media how she became aware of the new case.

The latest HIV scare comes less than a month after the launch of a new online sexual health database that is aimed at preventing the spread of the disease among porn performers. There is hope to achieve this through mandatory testing, and the latest scare has reignited the debate for condom use in adult film productions.

Testing is not a substitute for condom use, and it never will be, Michael Weinstein, president of the AIDS Healthcare Foundation in Los Angeles, told ABC News. No test can detect HIV from the moment of infection. There will always be a window period.

This window might not reflect recent infection.

If the initial case is confirmed, the coalition group will ask that two generations of the person's sexual partners to get tested. This means that those who had sex with the performer and the sexual partners of those who had sex with the performer will have to get tested, according to The AP.

This isn't the first time that the porn industry is being shut down.

There was a similar shut down in 2010 when porn star Derrick Burts was diagnosed HIV positive. Burt is now an advocating with the AIDS Healthcare Foundation for mandatory condom use in porn films.

But the foundation's push has gotten strong resistance from the industry.

If the market would accept condom-positive movies, that's what we would all be making, Christian Mann, general manager of Evil Angel Productions and unpaid Free Speech Coalition board member, told ABCNews.com when the database launched. The fact is consumers don't want that.

Mann also told ABC News that the market will always trump regulation.

If you make it so California-based productions cannot compete in the market, you'll just drive production out of the state, Mann said.

This voluntary industry shutdown will affect porn producers in the San Fernando Valley, the heart of the multi-billion dollar American porn industry, and includes Hustler and Evil Angel's productions, according to The AP.

Earlier in August, the health advocacy group said it would get about 41,138 petition signatures to get the condoms in porn issue on the June 2012 ballot.

California Aids Infection Los Angeles