Traveler's diarrhea

Traveler's diarrhea refers to the passage of 3 or more unformed stools per day during or after travel, or an indefinite number of unformed stools accompanied by fever, abdominal pain, or vomiting. The pathogens causing traveler's diarrhea can be classified into non-invasive and invasive types. The non-invasive type is characterized clinically by less obvious systemic toxic symptoms, no fever or obvious abdominal pain, diarrhea with watery, voluminous stools, no tenesmus, prone to dehydration and acidosis, no inflammatory cells in the stool, and generally a shorter course. The invasive type is characterized clinically by more obvious systemic toxic symptoms, fever, abdominal pain, and tenesmus, with diarrhea mostly being mucoid bloody stools or bloody watery stools, frequent but small in volume.