This is a question about my son's friend in Mexico with him. My son is studying abroad and teaching in Merida, Mexico and will be home this month. He just told me that one of the other students has had diarrhea the entire 2 months so far and had to be hospitalized and has inflamed colon. My son is wondering if he should be tested for any type of parasites when he gets home. So far, he hasn't had any gastro problems. Thanks for your advice.