Spectrum of Disease and Relation to Place of Exposure among Ill Returned Travelers
David O. Freedman, M.D., Leisa H. Weld, Ph.D., Phyllis E. Kozarsky, M.D., Tamara Fisk, M.D., Rachel Robins, M.D., Frank von Sonnenburg, M.D., Jay S. Keystone, M.D., Prativa Pandey, M.D., Martin S. Cetron, M.D., for the GeoSentinel Surveillance Network
Background Approximately 8 percent of travelers to the developingworld require medical care during or after travel. Current understandingof morbidity profiles among ill returned travelers is basedon limited data from the 1980s.
Methods Thirty GeoSentinel sites, which are specialized travelor tropical-medicine clinics on six continents, contributedclinician-based sentinel surveillance data for 17,353 ill returnedtravelers. We compared the frequency of occurrence of each diagnosisamong travelers returning from six developing regions of theworld.
Results Significant regional differences in proportionate morbiditywere detected in 16 of 21 broad syndromic categories. Amongtravelers presenting to GeoSentinel sites, systemic febrileillness without localizing findings occurred disproportionatelyamong those returning from sub-Saharan Africa or Southeast Asia,acute diarrhea among those returning from south central Asia,and dermatologic problems among those returning from the Caribbeanor Central or South America. With respect to specific diagnoses,malaria was one of the three most frequent causes of systemicfebrile illness among travelers from every region, althoughtravelers from every region except sub-Saharan Africa and CentralAmerica had confirmed or probable dengue more frequently thanmalaria. Among travelers returning from sub-Saharan Africa,rickettsial infection, primarily tick-borne spotted fever, occurredmore frequently than typhoid or dengue. Travelers from all regionsexcept Southeast Asia presented with parasite-induced diarrheamore often than with bacterial diarrhea.
Conclusions When patients present to specialized clinics aftertravel to the developing world, travel destinations are associatedwith the probability of the diagnosis of certain diseases. Diagnosticapproaches and empiric therapies can be guided by these destination-specificdifferences.
Source Information
From the Division of Geographic Medicine, University of Alabama at Birmingham, Birmingham (D.O.F.); the Division of Global Migration and Quarantine, Centers for Disease Control and Prevention, Atlanta (L.H.W., P.E.K., R.R., M.S.C.); the Division of Infectious Disease, Emory University, Atlanta (P.E.K., T.F.); the Department of Tropical and Infectious Diseases, University of Munich, Munich, Germany (F.S.); the Division of Infectious Diseases, University of Toronto, Toronto (J.S.K.); and CIWEC Clinic, Kathmandu, Nepal (P.P.). Dr. Fisk is deceased.
Address reprint requests to Dr. Freedman at the Division of Geographic Medicine, 1530 Third Ave. S., BBRB 203, Birmingham, AL 35294, or at freedman{at}uab.edu.
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