Investigators have their theories about the source of a salmonella outbreak that’s sickened more than four dozen people in the Indianapolis area this summer., but Lynae Granzow, an epidemiologist with the Indiana State Department of Health, declined to give specifics until their work is complete.

But she said it appears the cases originated from one source.

"Hopefully we’ll find the source before there are more cases," Granzow said.

The people who have been sickened may have picked up the salmonella from a restaurant, grocery store, untreated water source, even a lizard, which can carry the bacteria, Granzow said.