There may be more cases of cyclospora in Indiana.

The FDA is trying to figure out if a tainted salad mix may be linked to hundreds of mysterious illnesses in 14 other states.

The salad mix was served at some Olive Garden and Red Lobster restaurants.

It has already been connected to 22 cyclospora cases in Iowa and Nebraska.

Investigators are still tracking down all of the food sources.

"The company involved here has strict standards, but this is an emerging pathogen in this area. We haven't heard of this particular part of Mexico having problems with Cyclospora before," said Caroline Smith DeWaa of the Center for Science in the Public Interest.

Taylor Farms of Mexico says it is cooperating in the FDA's investigation and says the salad in question has been pulled.