Milk and milk products that may not have been properly pasteurized and kept refrigerated, in which case they offer an excellent breeding ground for bacteria. To be safe, milk should be boiled or used only in foods that will be cooked. Freshly opened canned milk or powdered milk mixed with purified water is okay. Pies, custards, gelatins, meringues, and pastries with creamy fillings all require continuous refrigeration to be safe. Meat, poultry, egg dishes, fish, and shellfish should be thoroughly cooked and eaten while still hot.
Flies are active carriers of infection.
Try not to eat food on which flies have landed. Be discriminating about restaurants and street vendors. Although one of the most exciting aspects of being in a foreign culture is trying indigenous foods and dishes, roadside food stalls are notorious for their lack of sanitation and as conduits of disease. If you do choose to eat from these, always check for cleanliness of the food, the utensils, and the vendors who handle the food.