The Centers for Disease Control and Prevention released the latest numbers yesterday concerning both imported and locally-acquired chikungunya cases on the continental United States, Puerto Rico and the US Virgin Islands. As of July 22, a total of 497 chikungunya cases have been reported to ArboNET from U.S. states and territories.
The data reported to ArboNET, as of July 22 shows that 70 percent of the states have reported imported, or travel associated chikungunya cases. One quarter of the 300 imported cases have been reported from Florida. Countries or territories visited include Anguilla, Dominica, Dominican Republic, Guyana, Haiti, Indonesia, Martinique, Puerto Rico, Saint Barthelemy, Saint Martin, Sint Maarten, and Tonga.
In addition to the continental US, the CDC shows the numbers from Puerto Rico and US Virgin Islands. Of the 197 autochthonous case recorded, 98 percent were seen in Puerto Rico.
Locally acquired case were also seen in Florida (2) and the US Virgin Islands (2). For more infectious disease news and information, visit and “like” the Infectious Disease News Facebook page
From 2006‒2013, studies identified an average of 28 people per year in the United States with positive tests for recent chikungunya virus infection (Range 5‒65 per year). All were travelers visiting or returning to the United States from affected areas, mostly in Asia. Only a quarter of the cases were reported to ArboNET.