Dengue Fever

What geographic areas are at high risk for contracting dengue fever?

Dengue is prevalent throughout the tropics and subtropics. Outbreaks have occurred recently in the Caribbean, including Puerto Rico, the U.S. Virgin Islands, Cuba, and Central America. Cases have also been imported via tourists returning from areas with widespread dengue, including Tahiti, Singapore, the South Pacific, including the Philippines, Southeast Asia, the West Indies, India, and the Middle East (similar in distribution to the areas of the world that harbor malaria and yellow fever). Dengue is now the leading cause of acute febrile illness in U.S. travelers returning from the Caribbean, South America, and Asia.

  • New Delhi, India, reported a recent outbreak of dengue fever, with 1,872 testing positive for the illness in September 2015.
  • In American Samoa, there were 370 cases of dengue reported from May 2015 to September 2, 2015, and 133 were hospitalized.
  • In 2015, two non-native species of mosquitoes were found in California, including the Aedes aegypti mosquito, which can transmit dengue. No cases of dengue have been reported yet.
  • Thailand reported the worst dengue outbreak in 20 years, with 126 deaths and 135,344 people infected with the virus, in October 2013.
  • In 2011, Bolivia, Brazil, Columbia, Costa Rica, El Salvador, Honduras, Mexico, Peru, Puerto Rico, and Venezuela reported a large number of dengue cases. Paraguay reported a dengue fever outbreak in 2011, the worst since 2007. Hospitals were overcrowded, and patients had elective surgeries canceled due to the outbreak. Continue Reading
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Reviewed on 4/28/2016
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