Figure. Comparison of confirmed cases of dengue fever and of symptomatic malaria in patients examined at the emergency department of Cayenne Hospital, Cayenne, French Guiana, January 2004–March 2006. The black frame corresponds to the period of the retrospective study (July 2004–June 2005). *Cases confirmed by positive test results from reverse transcription–PCR or virus isolation (Pasteur Institute, Cayenne). †Cases diagnosed based on recorded fever or history of fever in the previous 24 h associated with microscopic detection of asexual forms of Plasmodium spp. by blood smear.