In areas of the world where hygiene and sanitation are poor, fresh fruit and vegetables should always be selected with care. Avoid unpasteurized milk and milk products, such as cheese, and eat only fruit that you have peeled yourself. Following these precautions will help to avoid intestinal infections, such as travelers' diarrhea, which are caused by organisms in contaminated food or water. Prepare your own juice from fresh fruit. Iced drinks and non-carbonated bottled fluids made from water of uncertain quality should be avoided.
Many countries offer an abundance of food sold from roadside stands.
It is advisable to avoid such food unless and until you have ample evidence from reliable local sources that it is safe for visitors. Visitors lack these immunities, which means you should proceed with care. Assuming that there are no restaurants that meet the higher standard, the best recommendation is to seek sound advice from reputable travel guides or, even better, from your program director or on-site hosts. The most important way of coping with this disorder is to maintain adequate fluid intake to prevent dehydration. Most cases of diarrhea are self-limited and require only simple replacement of fluids and salts lost in diarrhea stools.