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Volume 14, Number 7—July 2008

Research

Seasonality, Annual Trends, and Characteristics of Dengue among Ill Returned Travelers, 1997–2006

Eli Schwartz*†, Leisa H. Weld‡, Annelies Wilder-Smith§, Frank von Sonnenburg¶, Jay S. Keystone#**, Kevin C. Kain#**, Joseph Torresi††‡‡, David O. Freedman§§Comments to Author , and for the GeoSentinel Surveillance Network
Author affiliations: *Chaim Sheba Medical Center, Tel Hashomer, Israel; †Tel Aviv University, Tel Aviv, Israel; ‡Statistical Consult, Victoria, British Columbia, Canada; §National University Singapore, Singapore; ¶University of Munich, Munich, Germany; #Toronto General Hospital, Toronto, Ontario, Canada; **University of Toronto, Toronto; ††University of Melbourne, Parkville, Victoria, Australia‡‡Royal Melbourne Hospital, Parkville; §§University of Alabama at Birmingham, Birmingham, Alabama, USA;

Main Article

Figure 1

Dengue fever in returned travelers as a proportion of monthly morbidity in all ill returned travelers to all regions of the world. Cumulative proportionate morbidity of 21 per 1,000 ill returned travelers (522 dengue reports among 24,920 ill travelers from October 1997 through February 2006) is shown by the horizontal line. *Proportionate morbidity is expressed as number of dengue cases per 1,000 ill returned travelers.

Figure 1. Dengue fever in returned travelers as a proportion of monthly morbidity in all ill returned travelers to all regions of the world. Cumulative proportionate morbidity of 21 per 1,000 ill returned travelers (522 dengue reports among 24,920 ill travelers from October 1997 through February 2006) is shown by the horizontal line. *Proportionate morbidity is expressed as number of dengue cases per 1,000 ill returned travelers.

Main Article

1In addition to the authors, members of the GeoSentinel Surveillance Network who contributed data are: Elizabeth Barnett, Boston University, Boston, Massachusetts, USA; Graham Brown, Royal Melbourne Hospital, Parkville, Victoria, Australia; Giampiero Carosi and Francesco Castelli, University of Brescia, Brescia, Italy; Lin Chen and Mary Wilson, Harvard University, Cambridge, Massachusetts, USA; Bradley Connor, Cornell University, New York, New York, USA; Jean Delmont and Philippe Parola, Hôpital Nord, Marseille, France; Devon Hale and Stefanie Gelman, University of Utah, Salt Lake City, Utah, USA; Elaine Jong and Jean Haulman, University of Washington, Seattle, Washington, USA; Phyllis Kozarsky and Carlos Franco, Emory University, Atlanta, Georgia, USA; Carmelo Licitra, Orlando Regional Health Center, Orlando, Florida, USA; Louis Loutan and Francois Chappuis, University of Geneva, Geneva, Switzerland; Poh Lian Lim, Tan Tock Seng Hospital, Singapore; Michael Lynch, Fresno International Travel Medical Center, Fresno, California, USA; Susan McLellan, Tulane University, New Orleans, Louisiana, USA; Prativa Pandey, CIWEC Clinic Travel Medicine Center, Kathmandu, Nepal; Cecilia Perret, Pontificia Universidad Católica de Chile, Santiago, Chile; Bradley Sack and Robin McKenzie, Johns Hopkins University, Baltimore, Maryland, USA; Hiroko Sagara, Yokohama Municipal Citizen's Hospital, Yokohama, Japan; Marc Shaw, Worldwise Travellers Health and Vaccination Centre, Auckland, New Zealand; Robert Steffan and Patricia Schlagenhauf, University of Zurich, Zurich, Switzerland; William Stauffer and Patricia Walker, University of Minnesota, Minneapolis, Minnesota, USA; and Murray Wittner, Albert Einstein School of Medicine, Bronx, New York, USA.

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