Food Safety Report: Portillo's & Barnelli's Chicago, West Ontario Street, Chicago, IL, USA, Portillo's & Barnelli's Summit, South Harlem Avenue, Summit, IL, USA 7 months ago • details 12 Suspected food poisoning. Symptoms: Diarrhea, Nausea, Vomiting, Fever, Stomach Pain, Cramps, Chills, Headache Suspected source: Strawberries Onset: 4 to 12 hours Duration: 12 to 24 hours Duration: 12 to 24 hours Additional information: Boyfriend also ate the strawberry shortcake and got sick.