• Zoe Greenwood, James Black, Leisa Weld, Daniel O'Brien, Karin Leder, Frank Von Sonnenburg, Prativa Pandey, Eli Schwartz, Bradley A Connor, Graham Brown, David O Freedman, Joseph Torresi, and GeoSentinel Surveillance Network.
• Victorian Infectious Diseases Service, Royal Melbourne Hospital, Victoria, Australia.
• J Travel Med. 2008 Jul 1; 15 (4): 221-8.

BackgroundData on relative rates of acquisition of gastrointestinal infections by travelers are incomplete. The objective of this study was to analyze infections associated with oral ingestion of pathogens in international travelers in relation to place of exposure.MethodsWe performed a multicenter, retrospective observational analysis of 6,086 travelers ill enough with any gastrointestinal infection to seek medical care at a GeoSentinel clinic after completion of travel during 2000 to 2005. We determined regional and country-specific reporting rate ratios (RRRs) in comparison to risk in northern and western Europe.ResultsTravel to sub-Saharan Africa (RRR = 282), South America (RRR = 203), and South Asia (RRR = 890) was associated with the greatest rate of gastrointestinal infections. RRRs were moderate (25-142) for travel to Oceania, the Middle East, North Africa, Central America, the Caribbean, and Southeast Asia. RRRs were least (<28) following travel to southern, central, and eastern Europe; North America; Northeast Asia; and Australasia. Income level of the country visited was inversely proportional to the RRR for gastrointestinal infection. For bacterial and parasitic infections examined separately, the regions group in the same way. RRRs could be estimated for 28 individual countries and together with regional data were used to derive a global RRR map for travel-related gastrointestinal infection.ConclusionsThis analysis of morbidity associated with oral ingestion of pathogens abroad determines which parts of the world currently are high-risk destinations.

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