Where in the US do most dengue cases occur?

Updated: May 03, 2019
  • Author: Darvin Scott Smith, MD, MSc, DTM&H; Chief Editor: Michael Stuart Bronze, MD  more...
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Answer

Most dengue cases in US citizens occur in Puerto Rico, the US Virgin Islands, Guam, and Samoa. Puerto Rico has experienced several seasonal outbreaks since 2015, with more significant transmission occurring from August to November. The last dengue epidemic in Florida (in the Tampa and Miami areas) occurred in 1934-1935 and affected an estimated 15,000 people of the population of 135,000 in Miami. The last recorded epidemic in the southeastern United States occurred in Louisiana in 1945. Outbreaks of dengue also occurred in Laredo, Texas, in 1998. Dengue reemerged in Florida in 2009-2010, however, with 27 locally acquired cases in Key West. [44] The index case in this outbreak was diagnosed after returning home to New York from a visit to Key West. This illustrates the importance of awareness of dengue among physicians outside endemic areas. In 2013, 23 cases were reported in Martin County, Florida. During that year, 120 cases were imported into Florida from various countries. [45] Since January 2010, dengue has been a reportable disease in the United States. [44]


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