sábado, 26 de julio de 2014

United States Geographic Distribution | Chikungunya virus | CDC

United States Geographic Distribution | Chikungunya virus | CDC



Chikungunya virus in the United States
Updates of chikungunya case counts are publically released every Tuesday evening (MT).

  • Chikungunya is not a nationally notifiable disease in the United States. However, chikungunya cases can be reported to ArboNET, the national surveillance system for arthropod-borne diseases.
  • 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.
  • Beginning in 2014, cases have been identified in travelers returning from the Caribbean. As of July 22, a total of 497 chikungunya cases have been reported to ArboNET from U.S. states and territories (Table). One hundred ninety-seven locally-transmitted cases have been reported from Florida, Puerto Rico, and the US Virgin Islands. All other cases occurred in travelers returning from affected areas in the Caribbean and South America (N=295), the Pacific Islands (N=4), or Asia (N=1).
  • With the recent outbreaks in the Caribbean and the Pacific, the number of chikungunya cases among travelers visiting or returning to the United States from affected areas will likely increase. These imported cases could result in additional local spread of the virus in the continental United States.

Chikungunya virus disease cases reported by state or territory – United States, 2014 (as of July 22, 2014)

Map of the United States showing locally acquired cases of Chikungunya in Florida and travel-associated cases reported in Arizona, Arkansas, California, Connecticut, Florida, Georgia, Hawaii, Idaho, Illinois, Indiana, Kansas, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Michigan, Minnesota, Mississippi, Nebraska, Nevada, New Hampshire, New Jersey, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, Puerto Rico, Rhode Island, Tennessee, Texas, US Virgin Islands, Virginia, West Virginia, and Wisconsin

Table. Chikungunya virus disease cases reported to ArboNET — United States, 2014 (as of July 22)*
State or territoryTravel-associated cases†‡ 
(N=300)
Locally-transmitted cases 
(N=197)
No.(%)No.(%)
Arizona1(<1)0(0)
Arkansas3(1)0(0)
California11(4)0(0)
Connecticut11(4)0(0)
Florida77(26)2(1)
Georgia6(2)0(0)
Hawaii1(<1)0(0)
Idaho1(<1)0(0)
Illinois1(<1)0(0)
Indiana3(1)0(0)
Kansas2(1)0(0)
Kentucky7(2)0(0)
Louisiana3(1)0(0)
Maine1(<1)0(0)
Maryland7(2)0(0)
Massachusetts2(1)0(0)
Michigan7(2)0(0)
Minnesota
8(3)0(0)
Mississippi5(2)0(0)
Nebraska
4(1)0(0)
Nevada1(<1)0(0)
New Hampshire2(1)0(0)
New Jersey12(4)0(0)
New York30(10)0(0)
North Carolina9(3)0(0)
Ohio8(3)0(0)
Oklahoma6(2)0(0)
Oregon1(<1)0(0)
Pennsylvania7(2)0(0)
Puerto Rico16(5)193(98)
Rhode Island11(4)0(0)
Tennessee18(6)0(0)
Texas4(1)0(0)
US Virgin Islands2(1)2(1)
Virginia9(3)0(0)
West Virginia1(<1)0(0)
Wisconsin2(1)0(0)
*Chikungunya is not a nationally notifiable disease.
†Countries or territories visited include Anguilla, Dominica, Dominican Republic, Guyana, Haiti, Indonesia, Martinique, Puerto Rico, Saint Barthelemy, Saint Martin, Sint Maarten, and Tonga.

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