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Emerging Causes of Traveler's Diarrhea: Cryptosporidium, Cyclospora, Isospora, and Microsporidia

Richard Goodgame1

  • 1Baylor College of Medicine, Room BCMD 525D, Houston, TX 77030, USA. goodgame@bcm.tmc.edu

Current Infectious Disease Reports
|January 15, 2003
PubMed

Insights

Travelers may contract protozoa infections like Cryptosporidium and Cyclospora, causing persistent diarrhea. Stool studies are crucial for diagnosis in travelers with diarrhea unresponsive to standard treatments.

Area of Science:

  • Infectious Diseases
  • Tropical Medicine
  • Gastroenterology

Background:

  • Travel is a significant risk factor for acquiring infections with spore-forming protozoa.
  • Specific travel destinations are associated with a higher disease burden and exposure risks.
  • Protozoa such as Cryptosporidium, Cyclospora, Microsporidia, and Isospora can cause gastrointestinal illness.

Purpose of the Study:

  • To highlight the importance of considering protozoa infections in travelers with persistent diarrhea.
  • To emphasize the need for specific diagnostic stool studies in certain clinical scenarios.
  • To inform about available treatments for these protozoan infections.

Main Methods:

  • Review of clinical presentations and risk factors associated with protozoan infections in travelers.
  • Discussion of diagnostic approaches, including stool studies for Cryptosporidium, Cyclospora, Microsporidia, and Isospora.
  • Analysis of treatment strategies based on the identified protozoa and disease severity.

Main Results:

  • Persistent diarrhea in travelers, especially from tropical developing countries, can be caused by protozoa.
  • Mild infections may be underdiagnosed and mimic typical traveler's diarrhea.
  • Stool studies are recommended for patients with travel history and diarrhea unresponsive to empirical treatments.

Conclusions:

  • Protozoa infections should be considered in the differential diagnosis of persistent traveler's diarrhea.
  • Prompt and accurate diagnosis through stool studies is essential for effective management.
  • Specific treatments are available for Cyclospora, Microsporidia, and Isospora infections, improving patient outcomes.

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