2018 Final Data for the United States

  • Chikungunya virus disease became a nationally notifiable condition in 2015. Cases are reported to CDC by state and local health departments using standard case definitions.
  • A total of 116 chikungunya virus disease cases with illness onset in 2018 were reported to ArboNET from 27 U.S. states (Table & Map). All reported cases occurred in travelers returning from affected areas. No locally-transmitted cases have been reported from U.S. states.
  • A total of eight chikungunya virus disease cases with illness onset in 2018 were reported to ArboNET from U.S. territories, all locally acquired cases from Puerto Rico (Table).

States reporting chikungunya virus disease cases – United States, 2018

Map of the United States showing states reporting travel-associated chikungunya virus disease cases, including California, Delaware, Florida, Georgia, Illinois, Kentucky, Louisiana, Maine, Maryland, Massachusetts, Minnesota, Missouri, New Jersey, New York, North Carolina, Ohio, Oregon, Pennsylvania, South Carolina, Texas, Utah, Virginia, and Washington

Table. Chikungunya virus disease cases reported to ArboNET by state or territory — United States, 2018

 

Laboratory-confirmed chikungunya virus disease cases reported to ArboNET by state or territory — United States, 2017 (as of December 11, 2018)
Travel-associated cases
No. (%)
Locally-transmitted cases
No. (%)
State  (N=116) (N=0)
California 27 (23) 0 (0)
Delaware 1 (1) 0 (0)
Florida 5 (4) 0 (0)
Georgia 1 (1) 0 (0)
Hawaii 1 (1) 0 (0)
Illinois 10 (9) 0 (0)
Kentucky 1 (1) 0 (0)
Louisiana 1 (1) 0 (0)
Maine 1 (1) 0 (0)
Maryland 2 (2) 0 (0)
Massachusetts 2 (2)  0 (0)
Minnesota 7 (6) 0 (0)
Missouri 2 (2) 0 (0)
New Hampshire 1 (1) 0 (0)
New Jersey 16 (14) 0 (0)
New Mexico 1 (1) 0 (0)
New York 14 (12) 0 (0)
North Carolina 3 (3) 0 (0)
Ohio 3 (3) 0 (0)
Oregon 1 (1) 0 (0)
Pennsylvania 1 (1) 0 (0)
South Carolina 1 (1) 0 (0)
Texas 7 (6) 0 (0)
Utah 1 (1) 0 (0)
Virginia 3 (3) 0 (0)
Washington 2 (2) 0 (0)
Wisconsin 1 (1) 0 (0)
Territories (N=0) (N=8)
Puerto Rico 0 (0) 8 (100)