fever in travelers

The differential diagnosis for fever in a returning traveler depends on geographic epidemiology and is often divided into 3 categories (with some overlap):

  • Early incubation period (<10 days) infections include typhoid fever, dengue fever, chikungunya, influenza, and legionellosis
  • Medium incubation period (1-3 weeks) infections include malaria, typhoid fever, leptospirosis, schistosomiasis, and rickettsial disease
  • Longer incubation period (>3 weeks) infections include tuberculosis, leishmaniasis, and enteric parasitic infections.