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Seasonality, annual trends, and characteristics of dengue among ill returned travelers, 1997-2006


Schwartz, E; Weld, L H; Wilder-Smith, A; von Sonnenburg, F; Keystone, J S; Kain, K C; Torresi, J; Freedman, D O (2008). Seasonality, annual trends, and characteristics of dengue among ill returned travelers, 1997-2006. Emerging Infectious Diseases, 14(7):1081-1088.

Abstract

We examined seasonality and annual trends for dengue cases among 522 returned travelers reported to the international GeoSentinel Surveillance Network. Dengue cases showed region-specific peaks for Southeast Asia (June, September), South Central Asia (October), South America (March), and the Caribbean (August, October). Travel-related dengue exhibited annual oscillations with several epidemics occurring during the study period. In Southeast Asia, annual proportionate morbidity increased from 50 dengue cases per 1,000 ill returned travelers in nonepidemic years to an average of 159 cases per 1,000 travelers during epidemic years. Dengue can thus be added to the list of diseases for which pretravel advice should include information on relative risk according to season. Also, dengue cases detected at atypical times in sentinel travelers may inform the international community of the onset of epidemic activity in specific areas.

Abstract

We examined seasonality and annual trends for dengue cases among 522 returned travelers reported to the international GeoSentinel Surveillance Network. Dengue cases showed region-specific peaks for Southeast Asia (June, September), South Central Asia (October), South America (March), and the Caribbean (August, October). Travel-related dengue exhibited annual oscillations with several epidemics occurring during the study period. In Southeast Asia, annual proportionate morbidity increased from 50 dengue cases per 1,000 ill returned travelers in nonepidemic years to an average of 159 cases per 1,000 travelers during epidemic years. Dengue can thus be added to the list of diseases for which pretravel advice should include information on relative risk according to season. Also, dengue cases detected at atypical times in sentinel travelers may inform the international community of the onset of epidemic activity in specific areas.

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Additional indexing

Contributors:GeoSentinel Surveillance Network
Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > Epidemiology, Biostatistics and Prevention Institute (EBPI)
Dewey Decimal Classification:610 Medicine & health
Language:English
Date:2008
Deposited On:16 Mar 2009 12:51
Last Modified:03 Aug 2017 15:01
Publisher:National Center for Infectious Diseases
ISSN:1080-6040
Free access at:PubMed ID. An embargo period may apply.
Publisher DOI:https://doi.org/10.3201/eid1407.071412
PubMed ID:18598629

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