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2016 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.
  • In 2016, a total of 248 chikungunya virus disease cases with illness onset in 2016 have been reported to ArboNET from 38 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.
  • In 2016, a total of 180 chikungunya virus disease cases with illness onset in 2016 have been reported to ArboNET from U.S. territories (Table). Of these, 179 were locally acquired cases reported from Puerto Rico and the US Virgin Islands.  The remaining case occurred in a traveler returning from other affected areas.

States reporting chikungunya virus disease cases – United States, 2016

Map of the United States showing states reporting travel-associated chikungunya virus disease cases, including, Alabama, Arizona, Arkansas, California, Connecticut, Delaware, Florida, Georgia, Hawaii, Illinois, Iowa, Kentucky, Louisiana, Maryland, Michigan, Minnesota, Missouri, Montana, Nebraska, New Hampshire, New Jersey, New Mexico, New York, North Carolina, Ohio, Pennsylvania, Rhode Island, South Carolina, Tennessee, Texas, Virginia, Washington, and Wisconsin.

Downloadable version of above map [PDF – 1 page]

Table. Laboratory-confirmed chikungunya virus disease cases reported to ArboNET by state or territory — United States, 2016

Travel-associated cases
No. (%)
Locally-transmitted cases
No. (%)
State  (N=248) (N=0)
Alabama 1 (<1) 0 (0)
Arizona 2 (1) 0 (0)
Arkansas 1 (<1) 0 (0)
California 57 (23) 0 (0)
Connecticut 2 (1) 0 (0)
Delaware 1 (<1) 0 (0)
Florida 8 (3) 0 (0)
Georgia 1 (<1) 0 (0)
Hawaii 4 (1) 0 (0)
Illinois 13 (5) 0 (0)
Indiana 2 (1) 0 (0)
Iowa 2 (1) 0 (0)
Kansas 1 (<1) 0 (0)
Kentucky 3 (1) 0 (0)
Louisiana 1 (<1) 0 (0)
Maryland 4 (2) 0 (0)
Massachusetts 6 (2) 0 (0)
Michigan 4 (2) 0 (0)
Minnesota 16 (7) 0 (0)
Missouri† 1 (<1) 0 (0)
Montana 1 (<1) 0 (0)
Nebraska 1 (<1) 0 (0)
New Hampshire 1 (<1) 0 (0)
New Jersey 11 (4) 0 (0)
New Mexico 3 (1) 0 (0)
New York 38 (15) 0 (0)
North Carolina 3 (1) 0 (0)
North Dakota 1 (<1) 0 (0)
Ohio 4 (2) 0 (0)
Pennsylvania 5 (2) 0 (0)
Rhode Island 3 (1) 0 (0)
South Carolina 4 (2) 0 (0)
Tennessee 4 (2) 0 (0)
Texas 20 (8) 0 (0)
Utah 1 (<1) 0 (0)
Virginia 6 (2) 0 (0)
Washington 10 (4) 0 (0)
Wisconsin 2 (1) 0 (0)
Territories (N=1) (N=179)
Puerto Rico 1 (100) 178 (99)
U.S. Virgin Islands 0 (0) 1 (1)
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