Infected meals are the greatest offender, with water arriving second. Frozen treats, cocktails offered in re-used coconut shells, raw sea food, ice, and food from street vendors are potential risks that may interrupt your adventure with less salacious recollections to pass through onto family and buddies.
The nausea, stomach cramps and diarrhea from such acute infections usually sorts itself out following a couple of days (unless of course obviously you've contracted hepatitis A, or something like that like giardia). Certainly, if you're unlucky enough to become sick following a couple of days, you need to visit a physician.
Fortunately, you will find remedies you are able to take which will strengthen your immune and digestive tract and hopefully provide your body an improved chance at coping with its new atmosphere. The herbs I describe below will make a great travelers mix. The very best form to consider them in could be like a tincture, which may be composed by visiting a nearby herbal dispensary for those who have one in your town, or else, a nearby herbalist.