Douglas A. Drossman, MD: It's not uncommon for people to travel to Latin American countries where there might be uh bacteria or other things in the water that might lead to what we call touristo, or some type of infection as the result of taking in one of these bacteria. Uh Montezuma's revenge has been another term for it. But basically, if you have that and it becomes much more debilitating, if it happens more frequently, and you know when you have it and it's a real infection. If you anticipate going to a place where you might get an infection, certain things you can either bring with you or get there, such as loperamide, uh for diarrhea, to slow down diarrhea. If you really know you'll be in an area of infection, you might carry something like ciprofloxacin, which is an antibiotic that treats most bacterial infections. One thing I would want to caution you is that sometimes people are extremely careful about the water they drink, drinking bottled water, but then they get, go back on the plane and go home and they get it. And that's often because the food that was put on the plane might have been treated with the water from locally and they often might get the infection after they get back.