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Chikungunya virus in the United States, 2015

  • Chikungunya virus disease is now a nationally notifiable condition. Cases are reported to CDC by state and local health departments using standard case definitions.
  • As of February 24, a total of 43 chikungunya virus disease cases have been reported to ArboNET from 8 U.S. states for 2015 (Figure & Table 1). All reported cases occurred in travelers returning from affected areas. During 2015, no locally-transmitted cases have been reported from U.S. states.
  • A total of 45 chikungunya virus disease cases have been reported to ArboNET from U.S. territories (Table 2). All reported cases were locally-transmitted cases reported from Puerto Rico and the US Virgin Islands.
  • Click here for a summary of all 2014 travel imported and locally acquired chikungunya virus disease cases in the United States.

Chikungunya virus disease cases reported by state – United States, 2015 (as of February 24, 2015)

Map of the United States showing travel-associated cases reported in Arkansas, Colorado, Florida, Indiana, Kentucky, Maryland, Missouri, New Jersey, New York, Ohio, Pennsylvania, Texas, Washington
Table 1. Laboratory-confirmed chikungunya virus disease cases reported to ArboNET by state— United States, 2015 (as of February 24, 2015)
State Travel-associated cases
(N=43)
Locally-transmitted cases
(N=0)
No. (%) No. (%)
Arkansas 1 (2) 0 (0)
Colorado 1 (2) 0 (0)
Florida 12 (28) 0 (0)
Indiana 1 (2) 0 (0)
Kentucky 2 (5) 0 (0)
Maryland 4 (9) 0 (0)
Missouri 3 (7) 0 (0)
New Jersey 3 (7) 0 (0)
New York 9 (21) 0 (0)
Ohio 1 (2) 0 (0)
Pennsylvania 2 (5) 0 (0)
Texas 3 (7) 0 (0)
Washington 1 (2) 0 (0)

 

Table 2. Laboratory-confirmed chikungunya virus disease cases reported to ArboNET by territory — United States, 2015 (as of February 24, 2015)
Territory Travel-associated cases
(N=0)
Locally-transmitted cases
(N=45)
No. (%) No. (%)
Puerto Rico* 0 (0) 44 (98)
US Virgin Islands† 0 (0) 1 (2)

*Additional information available from the Puerto Rico Department of Health.
Additional information available from the U.S. Virgin Islands Department of Health.

 
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