Statistics & Maps
In the United States, an average of 17 Jamestown Canyon virus neuroinvasive disease cases are reported each year. There is significant under-diagnosis and under-reporting of less severe cases of Jamestown Canyon virus disease, therefore reported neuroinvasive disease cases are used to compare trends over time and place. Jamestown Canyon virus disease is a nationally notifiable condition. To ensure standardization of reporting across the country, CDC recommends that the national surveillance case definition (standardized reporting criteria) be consistently applied by all state health departments.
Most Jamestown Canyon virus infections occur from April through September. The virus is found throughout much of the United States, but Minnesota and Wisconsin have reported more than half of all cases. The recent increase in reported cases likely reflects increased awareness and testing, but also could be due to an increase in disease incidence.
Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
Print only version [PDF – 1 page]
Year | Number of reported cases |
---|---|
2012 | 1 |
2013 | 15 |
2014 | 6 |
2015 | 6 |
2016 | 7 |
2017 | 58 |
2018 | 25 |
2019 | 25 |
2020 | 10 |
2021 | 21 |
Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
Print only version [PDF – 1 page]
State of Residence | Cases |
---|---|
Connecticut | 1 |
Illinois | 1 |
Indiana | 1 |
Louisiana | 1 |
Maine | 3 |
Massachusetts | 10 |
Michigan | 10 |
Minnesota | 41 |
New Hampshire | 13 |
New Jersey | 2 |
New York | 4 |
North Carolina | 1 |
Ohio | 2 |
Oregon | 1 |
Rhode Island | 2 |
Tennessee | 2 |
Wisconsin | 79 |
Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
Print only version [PDF – 1 page]
Data table: This map shows the distribution of Jamestown Canyon virus neuroinvasive disease (encephalitis and/or meningitis) average annual incidence by county of residence from 2012 through 2021. Counties are shaded according to incidences ranging from less than 0.20, 0.20 to 0.49, and greater than 0.50 per 100,000 population. Shaded counties are primarily in northern states.
Additional Maps, Charts, and Tables
Neuroinvasive disease | Non-neuroinvasive disease | Total | ||||
---|---|---|---|---|---|---|
Year | Cases No. |
Deaths No. (%) |
Cases No. |
Deaths No. (%) |
Cases No. |
Deaths No. (%) |
2012 | 1 | 0 (0) | 1 | 0 (0) | 2 | 0 (0) |
2013 | 15 | 0 (0) | 7 | 0 (0) | 22 | 0 (0) |
2014 | 6 | 0 (0) | 5 | 0 (0) | 11 | 0 (0) |
2015 | 6 | 0 (0) | 5 | 0 (0) | 11 | 0 (0) |
2016 | 7 | 0 (0) | 8 | 0 (0) | 15 | 0 (0) |
2017 | 58 | 2 (3) | 17 | 0 (0) | 75 | 2 (3) |
2018 | 25 | 1 (4) | 16 | 0 (0) | 41 | 1 (2) |
2019 | 25 | 2 (8) | 20 | 0 (0) | 45 | 2 (4) |
2020 | 10 | 0 (0) | 3 | 0 (0) | 13 | 0 (0) |
2021 | 21 | 2 (9) | 11 | 0 (0) | 32 | 2 (6) |
Total | 174 | 7 (4) | 93 | 0 (0) | 267 | 7 (3) |
Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
State | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | Total |
---|---|---|---|---|---|---|---|---|---|---|---|
Alabama | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Alaska | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Arizona | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Arkansas | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
California | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Colorado | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Connecticut | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 1 |
Delaware | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Dist. of Columbia | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Florida | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Georgia | 0 | 1 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 2 |
Hawaii | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Idaho | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Illinois | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 1 |
Indiana | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 1 |
Iowa | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Kansas | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Kentucky | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Louisiana | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
Maine | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 0 | 0 | 1 | 4 |
Maryland | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Massachusetts | 0 | 1 | 1 | 1 | 2 | 2 | 1 | 4 | 0 | 0 | 12 |
Michigan | 0 | 0 | 0 | 0 | 0 | 0 | 2 | 1 | 3 | 6 | 12 |
Minnesota | 0 | 1 | 4 | 2 | 6 | 22 | 11 | 21 | 0 | 6 | 73 |
Mississippi | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Missouri | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Montana | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Nebraska | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Nevada | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
New Hampshire | 0 | 1 | 0 | 0 | 0 | 3 | 0 | 3 | 5 | 5 | 17 |
New Jersey | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 2 | 3 |
New Mexico | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
New York | 1 | 3 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 4 |
North Carolina | 0 | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 1 |
North Dakota | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Ohio | 0 | 0 | 0 | 1 | 0 | 1 | 0 | 0 | 0 | 0 | 2 |
Oklahoma | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Oregon | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Pennsylvania | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Puerto Rico | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Rhode Island | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 1 | 2 |
South Carolina | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
South Dakota | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Tennessee | 0 | 0 | 1 | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 2 |
Texas | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Utah | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Vermont | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Virginia | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Washington | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
West Virginia | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 |
Wisconsin | 1 | 11 | 5 | 4 | 7 | 43 | 23 | 15 | 5 | 10 | 124 |
Wyoming | 0 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 0 | 1 |
Total | 2 | 22 | 11 | 11 | 15 | 75 | 41 | 45 | 13 | 32 | 267 |
Source: ArboNET, Arboviral Diseases Branch, Centers for Disease Control and Prevention
To request data for previous years, please email dvbid2@cdc.gov.
Print only version [PDF – 1 page]
National & state maps (including county-level data) from 2003 – present