Patient AM, a 35-year-old nurse, presented to the hospital complaining of persistent diarrhea and abdominal cramps for two days. She reports having 5 episodes of watery diarrhea per day since returning from a family picnic. Over-the-counter Imodium provided no relief. Her past medical history is otherwise unremarkable. A review of systems is negative except for the presenting complaints. She has no significant family history. A physical exam will be performed to further evaluate the cause of her diarrhea and abdominal cramps.