Hi, this is such a topical point right now. More and more medical evidence is linking gastro-intestinal upset with previous bouts of food poisoning and gastro-enteritis. The reason for this is that these conditions cause an imbalance between the good bacteria inside the gut and the bad bacteria. This condition is known as dysbiosis. Once we lose this balance of good bacteria, our digestive process suffers, resulting in more gas production, inflammation, slower bowel transit times and poor nutritional absorption. One can investigate this directly by evaluating stool compositions at a laboratory and the imbalance can be treated by restoring this balance inside the gut using prebiotics, probiotics, digestive enzymes and natural anti-inflammatories and detoxing agents. Sometimes temporary exclusion diets are also necessary. Wishing you a healthy recovery.