Mikey is a 28 y/o male who presents to your clinic c/o 6 episodes of persistent, watery diarrhea that began today with associated periumbilical cramping, nausea, and multiple episodes of vomiting. He denies any fever, chills, weight loss, hematemesis, melena, hematochezia, or arthralgias. Pt states his symptoms began about 8 hours after going out to eat with his friend. He denies any recent traveling. Electrolytes were drawn and shows patient is hypokalemic. Stool culture is pending. Which of the following is the most common cause of his symptoms?
Select one or more of the following: