WASHINGTON (AP) — Donna Heller thought she had cancer. But multiple visits to the doctor after a month with debilitating nausea and diarrhea didn’t yield any answers. Convinced she was dying, she met with her lawyer to get her will in order.

Then she saw a television report about an outbreak of cyclospora possibly linked to bagged salad mix. The stomach illness matched all her symptoms and is easily treatable with antibiotics. She told her doctor she suspected that could be the cause, and tests showed she was right.