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[Enteropathogens in travellers returning from the tropics].

K Markwalder, M Altwegg, O Kehl

    Schweizerische Medizinische Wochenschrift
    |July 26, 1986
    PubMed
    Summary

    Travelers returning from the tropics with diarrhea often have bacterial or parasitic infections. Routine stool exams for asymptomatic travelers are generally not recommended, even with a history of traveler's diarrhea.

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    Area of Science:

    • Tropical Medicine
    • Infectious Diseases
    • Gastroenterology

    Background:

    • Travelers' diarrhea is a common health issue for those visiting tropical regions.
    • Returning travelers frequently seek medical attention for gastrointestinal symptoms.
    • Identifying enteropathogens is crucial for understanding travel-related illnesses.

    Purpose of the Study:

    • To determine the prevalence of bacterial and parasitic enteropathogens in travelers returning from the tropics.
    • To compare laboratory stool examination results with clinical symptoms.
    • To assess the necessity of routine stool examinations for asymptomatic travelers.

    Main Methods:

    • Prospective study of 173 returning travelers attending an outpatient department.
    • Stool examinations for bacterial pathogens and pathogenic protozoans (Giardia lamblia, Entamoeba histolytica).
    • Comparison of pathogen detection rates between symptomatic and asymptomatic individuals.

    Main Results:

    • 11% of travelers harbored bacterial pathogens; 15% had pathogenic protozoans.
    • Enteropathogens were found in 46% of symptomatic travelers versus 11% of asymptomatic travelers (p < 0.01).
    • Giardia lamblia and Entamoeba histolytica were the most common protozoan findings.

    Conclusions:

    • Bacteriological stool examinations are generally not indicated for travelers returning from the tropics without diarrhea.
    • Parasitological investigations may be warranted only if asymptomatic carriage of Giardia or Entamoeba histolytica requires treatment.
    • Clinical presentation is a key factor in deciding the diagnostic approach for returning travelers.

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