Food Safety Report: Hotel Riu Guanacaste, RIU Guanacaste Route, Guanacaste Province, Sardinal District, Costa Rica 3 years ago • details 2 Comments Comment Suspected food poisoning. Symptoms: Diarrhea, Nausea, Stomach Pain, Cramps, Chills, Headache Suspected source: Beef, drinks, seafood Onset: 1 day Duration: 3 days