[blueash]

This type of complaint is almost always without any merit. Just because you got acute gastroenteritis it does not remotely prove that the source was the last place you ate. Foodborne illnesses are real but they represent a tiny fraction of cases of vomiting and/or diarrhea. Additionally many foodborne illness have incubation periods of many hours or even days making it very difficult to identify the source. A visit to your doctor or a doc-in-a-box will not clarify the situation without stool testing for pathogens. Why spend the money on that unless you are extremely ill, passing blood, high fevers, recent out of the country exposure, raw milk, contact with raw or undercooked foods, or other recognized epidemiological risk factors.

Even foodborne pathogens are more commonly spread by hand to hand contact, or actually fecal-oral mechanisms. That is why when there is a norovirus outbreak on a ship they don't throw out all the food, they enforce handwashing and sterilize surfaces. Even the situation where a group all eats the same food and all become sick is not proof of a foodborne illness as they all likely touched each other as well. Contact the health department which has epidemiologists to perform proper investigations for guidance if you are convinced that you or a family member has been made ill from a restaurant meal.