The FDA says it still has no idea what caused that salmonella outbreak that's sickened hundreds of Americans.

Investigators thought tomatoes were to blame, but now they aren't so sure.

In the meantime, the food industry's losing millions of dollars.

The CDC says over 800 people have fallen ill with salmonella in 36 states, some less than two weeks ago.

While the FDA still calls tomatoes the "lead suspect"

New information over the weekend has them looking at possible cross-contamination with other foods, but investigators won't say what those foods are.

It's been almost three months; even the FDA calls the investigation "frustratingly slow." But today, FDA's boss said just the opposite. The FDA hasn't changed its recommendations: avoid red, roma and plum tomatoes, grape, cherry and vine tomatoes are ok.

But officials warn that could change.

The food industry reports this outbreak has cost them over 250 million dollars.

Florida growers are taking action to reassure the public by supporting a new law, effective today, which subjects them to more inspections and more training.