2015 Case Counts in the US
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Final data reported to ArboNET
In 2015, Zika was not a nationally notifiable disease in the United States. However, Zika cases could be reported to ArboNET, the national surveillance system for arthropod-borne diseases. These are final 2015 data reported to ArboNET for Zika virus disease.
US States
- 61 symptomatic Zika virus disease cases reported
- 61 cases in travelers returning from affected areas
- 0 cases acquired through presumed local mosquito-borne transmission
- 0 cases acquired through other routes (e.g., sexual, laboratory, or blood borne transmission)
US Territories
- 9 symptomatic Zika virus disease cases reported
- 1 case in a traveler returning from an affected area
- 8 cases acquired through presumed local mosquito-borne transmission
- 0 cases acquired through other routes†
Footnotes
†Sexually transmitted cases are not reported for US territories because with local transmission of Zika virus it is not possible to determine whether infection occurred due to mosquito-borne or sexual transmission.
Cases by State and Territory
| Laboratory-confirmed symptomatic Zika virus disease cases and presumptive viremic blood donors reported to ArboNET by states and territories— United States, 2015 | ||||
|---|---|---|---|---|
|
Symptomatic disease cases*
(N=61) |
Presumptive viremic blood donors†
(N=0) |
|||
| States | No. | (%) | No. | (%) |
| Alabama | 0 | (0) | 0 | (0) |
| Arizona | 0 | (0) | 0 | (0) |
| Arkansas | 2 | (3) | 0 | (0) |
| California | 13 | (21) | 0 | (0) |
| Colorado | 0 | (0) | 0 | (0) |
| Connecticut | 0 | (0) | 0 | (0) |
| Delaware | 0 | (0) | 0 | (0) |
| District of Columbia | 4 | (7) | 0 | (0) |
| Florida | 9 | (15) | 0 | (0) |
| Georgia | 1 | (2) | 0 | (0) |
| Hawaii | 4 | (7) | 0 | (0) |
| Idaho | 0 | (0) | 0 | (0) |
| Illinois | 0 | (0) | 0 | (0) |
| Indiana | 1 | (2) | 0 | (0) |
| Iowa | 0 | (0) | 0 | (0) |
| Kansas | 0 | (0) | 0 | (0) |
| Kentucky | 1 | (2) | 0 | (0) |
| Louisiana | 0 | (0) | 0 | (0) |
| Maine | 0 | (0) | 0 | (0) |
| Maryland | 2 | (3) | 0 | (0) |
| Massachusetts | 2 | (3) | 0 | (0) |
| Michigan | 0 | (0) | 0 | (0) |
| Minnesota | 1 | (2) | 0 | (0) |
| Mississippi | 0 | (0) | 0 | (0) |
| Missouri | 1 | (2) | 0 | (0) |
| Montana | 0 | (0) | 0 | (0) |
| Nebraska | 0 | (0) | 0 | (0) |
| Nevada | 0 | (0) | 0 | (0) |
| New Hampshire | 1 | (2) | 0 | (0) |
| New Jersey | 1 | (2) | 0 | (0) |
| New Mexico | 0 | (0) | 0 | (0) |
| New York | 3 | (5) | 0 | (0) |
| North Carolina | 0 | (0) | 0 | (0) |
| North Dakota | 0 | (0) | 0 | (0) |
| Ohio | 0 | (0) | 0 | (0) |
| Oklahoma | 0 | (0) | 0 | (0) |
| Oregon | 0 | (0) | 0 | (0) |
| Pennsylvania | 1 | (2) | 0 | (0) |
| Rhode Island | 1 | (2) | 0 | (0) |
| South Carolina | 0 | (0) | 0 | (0) |
| South Dakota | 0 | (0) | 0 | (0) |
| Tennessee | 0 | (0) | 0 | (0) |
| Texas | 8 | (13) | 0 | (0) |
| Utah | 1 | (2) | 0 | (0) |
| Vermont | 0 | (0) | 0 | (0) |
| Virginia | 4 | (7) | 0 | (0) |
| Washington | 0 | (0) | 0 | (0) |
| West Virginia | 0 | (0) | 0 | (0) |
| Wisconsin | 0 | (0) | 0 | (0) |
| Wyoming | 0 | (0) | 0 | (0) |
|
Symptomatic disease cases*
(N=9) |
Presumptive viremic blood donors†
(N=0) |
|||
| Territories | No. | (%) | No. | (%) |
| American Samoa | 0 | (0) | 0 | (0) |
| Puerto Rico | 9 | (100) | 0 | (0) |
| U.S. Virgin Islands | 0 | (0) | 0 | (0) |
Footnotes
*Includes reported confirmed and probable Zika virus disease cases per the CSTE case definitions.
†Presumptive viremic blood donors are people who reported no symptoms at the time of donating blood, but whose blood tested positive when screened for the presence of Zika virus RNA by the blood collection agency. Some presumptive viremic blood donors develop symptoms after their donation or may have had symptoms in the past. These individuals may be reported as both Zika virus disease cases and presumptive viremic blood donors.
- Page last reviewed: May 25, 2017
- Page last updated: May 25, 2017
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