Reports of Lyme Disease in Oregon
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Confirmed cases
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826
Confirmed cases of Lyme disease in Oregon (2000 to 2020).
Yearly Breakdown
View as a table
| Year | Confirmed cases |
|---|---|
| 2000 | 13 |
| 2001 | 15 |
| 2002 | 12 |
| 2003 | 16 |
| 2004 | 11 |
| 2005 | 3 |
| 2006 | 7 |
| 2007 | 6 |
| 2008 | 38 |
| 2009 | 38 |
| 2010 | 39 |
| 2011 | 38 |
| 2012 | 48 |
| 2013 | 43 |
| 2014 | 45 |
| 2015 | 31 |
| 2016 | 61 |
| 2017 | 84 |
| 2018 | 70 |
| 2019 | 130 |
| 2020 | 78 |
Oregon's Counties
| County | Confirmed cases | Share of state |
|---|---|---|
| Multnomah County | 144 | 17.4% |
| Jackson County | 92 | 11.1% |
| Josephine County | 79 | 9.6% |
| Douglas County | 58 | 7.0% |
| Clackamas County | 53 | 6.4% |
| Washington County | 40 | 4.8% |
| Benton County | 35 | 4.2% |
| Lane County | 32 | 3.9% |
| Deschutes County | 23 | 2.8% |
| Klamath County | 22 | 2.7% |
| Marion County | 18 | 2.2% |
| Hood River County | 14 | 1.7% |
| Linn County | 13 | 1.6% |
| Yamhill County | 13 | 1.6% |
| Coos County | 11 | 1.3% |
| Wasco County | 11 | 1.3% |
| Polk County | 10 | 1.2% |
| Curry County | 7 | 0.8% |
| Umatilla County | 7 | 0.8% |
| Columbia County | 6 | 0.7% |
| Wallowa County | 6 | 0.7% |
| Malheur County | 5 | 0.6% |
| Clatsop County | 4 | 0.5% |
| Lincoln County | 4 | 0.5% |
| Union County | 4 | 0.5% |
| Tillamook County | 3 | 0.4% |
| Baker County | 2 | 0.2% |
| Grant County | 2 | 0.2% |
| Lake County | 2 | 0.2% |
| Harney County | 1 | 0.1% |
| Jefferson County | 1 | 0.1% |
| Crook County | 0 | 0.0% |
| Gilliam County | 0 | 0.0% |
| Morrow County | 0 | 0.0% |
| Sherman County | 0 | 0.0% |
| Wheeler County | 0 | 0.0% |
| Unknown County | 104 | 12.6% |
"Unknown County" counts cases the CDC confirmed in Oregon without a county of residence. They are included in the state total but not on the map.
Data Sources
All Lyme disease prevalence data sourced from the Centers for Disease Control and Prevention's surveillance data. Cases are counted by the patient's county of residence, which may not be where the tick bite occurred.
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