Stomach pain and diarrhea are the main symptoms, but sometimes nausea, vomiting, or even fever and / or blood are added (and in this case, medical advice is required). The most risky period is within 3 to 5 days after arriving at the vacation spot. The majority of turistas recover spontaneously in three to five days during which one should be particularly wary of the risk of dehydration (main complication).