Fever in returning travelers: a case-based approach

Area of Science:

• Tropical Medicine
• Infectious Diseases
• Travel Medicine

Background:

• A significant percentage of travelers to developing nations (3-19%) return with or develop fever post-travel.
• Fever in returning travelers necessitates a thorough evaluation of pretravel health, medication use, pathogen exposure, and symptom onset timing.

Purpose of the Study:

• To outline the key considerations for diagnosing fever in travelers returning from endemic areas.
• To highlight common tropical infections presenting as fever in returning travelers and their diagnostic approaches.

Main Methods:

• Review of clinical presentation and diagnostic strategies for febrile illnesses in international travelers.
• Emphasis on patient history, including immunizations, medications, travel exposures, and incubation periods.
• Physical examination to identify focal findings and differential diagnosis, including common U.S. illnesses and specific tropical diseases.

Main Results:

• Common tropical causes of fever without a clear focus include malaria, dengue fever, and typhoid fever.
• These infections share overlapping symptoms: fever, headache, myalgia, arthralgia, malaise, and hematologic changes (leukopenia, thrombocytopenia).
• Diagnostic methods vary: malaria via blood smear, dengue fever clinically (confirmed by serology/PCR), and typhoid fever via culture.

Conclusions:

• Prompt and accurate diagnosis of fever in returning travelers is crucial for appropriate management.
• A systematic approach considering travel history and differential diagnoses, including common tropical infections, is essential.
• Specific diagnostic tools are available for malaria, dengue fever, and typhoid fever, guiding treatment decisions.