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Summary
Travelers' diarrhea is a syndrome, not a disease, often caused by toxins from bacteria like Escherichia coli. While hygienic precautions lack evidence, antibiotics can prevent E. coli infections but carry risks.
Area of Science:
- Gastroenterology
- Infectious Diseases
- Public Health
Background:
- Travelers' diarrhea is a common syndrome, distinct from dysentery, characterized by intact intestinal cells responding to toxins.
- While toxigenic Escherichia coli is a frequent cause, various viruses, bacteria, and protozoa also contribute significantly to traveler's diarrhea cases.
- Current hygienic advice lacks strong evidence of efficacy, and antibiotic prophylaxis, though effective against E. coli, presents toxicity and diagnostic challenges.
Purpose of the Study:
- To review the history and current understanding of travelers' diarrhea.
- To differentiate the pathophysiology of dysentery and diarrhea.
- To evaluate diagnostic and treatment strategies for travelers' diarrhea.
Main Methods:
- Historical review of travelers' diarrhea literature.
- Analysis of etiological agents and their mechanisms.
- Assessment of diagnostic accuracy and treatment efficacy.
Main Results:
- Diarrhea results from intact intestinal cells responding to toxins, unlike dysentery which damages the intestinal epithelium.
- Toxigenic Escherichia coli is the most common pathogen, causing a benign syndrome, but other infectious agents are also prevalent.
- Antibiotic prophylaxis is effective for E. coli but has drawbacks; diagnosis is often imprecise, and treatment focuses on fluid replacement.
Conclusions:
- Travelers' diarrhea is a syndrome with diverse causes, requiring improved diagnostic methods.
- Current treatment recommendations emphasize fluid and ion replacement, with limited use of motility-reducing drugs or antibiotics.
- Reducing the fear of travelers' diarrhea could significantly boost international travel, especially to developing nations.