Travel-associated illness trends and clusters, 2000–2010
Brownstein, John S.
Wilson, Mary E.
Keystone, Jay S.
Sonnenburg, Frank von
Freedman, David O.
Cheng, Allen C.
Date of Issue2013
Lee Kong Chian School of Medicine
Longitudinal data examining travel-associated illness patterns are lacking. To address this need and determine trends and clusters in travel-related illness, we examined data for 2000–2010, prospectively collected for 42,223 ill travelers by 18 GeoSentinel sites. The most common destinations from which ill travelers returned were sub-Saharan Africa (26%), Southeast Asia (17%), south-central Asia (15%), and South America (10%). The proportion who traveled for tourism decreased significantly, and the proportion who traveled to visit friends and relatives increased. Among travelers returning from malaria-endemic regions, the proportionate morbidity (PM) for malaria decreased; in contrast, the PM trends for enteric fever and dengue (excluding a 2002 peak) increased. Case clustering was detected for malaria (Africa 2000, 2007), dengue (Thailand 2002, India 2003), and enteric fever (Nepal 2009). This multisite longitudinal analysis highlights the utility of sentinel surveillance of travelers for contributing information on disease activity trends and an evidence base for travel medicine recommendations.
Emerging infectious diseases
© 2013 Public Domain. This paper was published in Emerging Infectious Diseases and is made available as an electronic reprint (preprint) with permission of Public Domain. The paper can be found at the following official DOI: [http://dx.doi.org/10.3201/eid1907.121573]. One print or electronic copy may be made for personal use only. Systematic or multiple reproduction, distribution to multiple locations via electronic or other means, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper is prohibited and is subject to penalties under law.