most common illness in persons traveling from resource-rich to resource-poor regions of the world
three forms: classic, moderate, and mild [3]. For epidemiologic studies, the three types can be grouped together to estimate a total number of cases of TD. These forms of TD are defined as follows [3]:
◾Classic — passage of three or more unformed stools in a 24 hour period plus at least one of these other symptoms: nausea, vomiting, abdominal pain or cramps, fever, blood in stools
◾Moderate — passage of one or two unformed stools in 24 hours plus at least one of the above symptoms or more than two unformed stools in 24 hours without other symptoms
◾Mild — passage of one or two unformed stools in 24 hours without other symptoms: usually has a viral cause (rotavirus, Norwalk agent);