Traveler's diarrhea.

Three hundred million people, mostly tourists, participate in international travel each year. Development of an acute diarrheal syndrome abroad, while returning home, or shortly after arriving home is referred to as traveler's diarrhea (TD). TD is not a specific diagnosis but, rather, a clinical syndrome with multiple etiologies. In this article, clinical and epidemiological features of TD, specific etiologies and their pathogenesis, as well as current means of diagnosis, treatment, and prevention will be reviewed.