Seek medical attention if you have bloody diarrhea, high fever, persistent vomiting, severe abdominal pain, profuse sweating, or signs of dehydration.
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Call a doctor if you have diarrhea that is severe, lasts more than a few days or is bloody. If you are traveling, call an embassy or consulate for help locating a doctor. Other signs that you should seek medical attention include: A fever of 102 F (39 C) or higher.
Untreated, bacterial diarrhea usually lasts 3–7 days. Viral diarrhea generally lasts 2–3 days. Protozoal diarrhea can persist for weeks to months without treatment. An acute bout of TD can lead to persistent enteric symptoms, even in the absence of continued infection.
Water or an oral rehydration solution is best. Drink at least 1 cup (240 milliliters) of liquid every time you have a loose bowel movement. Eat small meals every few hours instead of three big meals. Eat some salty foods, such as pretzels, crackers, soup, and sports drinks.
Although loperamide is the recommended first-line agent, patients should be informed that if the diarrhea worsens or is accompanied by moderate-severe or invasive symptoms (1 or more of fever, moderate to severe abdominal pain or bloody diarrhea), then antibiotics should be used (Table 2).
Although most cases of travelers' diarrhea (TD) are acute and self-limited, a certain percentage of people afflicted will develop persistent (>14 days) gastrointestinal (GI) symptoms.
It can be fatal if it's left untreated. In addition to being picked up from contaminated food or water, the bacteria or parasites that cause dysentery can be passed from person to person in close contact, or you can get it by swimming in unclean water.
Traveler's diarrhea may get better without any treatment. But while you're waiting, it's important to try to stay hydrated with safe liquids, such as bottled water or water with electrolytes such as an oral rehydration solution (see below).
Most cases are mild, but for some people it is severe. Travellers' diarrhoea tends to happen in the first week of travel. Symptoms last on average 3 to 5 days and usually get better without you needing specific treatment.