Reports of Lyme Disease in Maine
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Confirmed cases
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21,963
Confirmed cases of Lyme disease in Maine (2000 to 2020).
Yearly Breakdown
View as a table
| Year | Confirmed cases |
|---|---|
| 2000 | 71 |
| 2001 | 108 |
| 2002 | 219 |
| 2003 | 175 |
| 2004 | 225 |
| 2005 | 247 |
| 2006 | 338 |
| 2007 | 529 |
| 2008 | 908 |
| 2009 | 970 |
| 2010 | 751 |
| 2011 | 1,006 |
| 2012 | 1,111 |
| 2013 | 1,373 |
| 2014 | 1,401 |
| 2015 | 1,201 |
| 2016 | 1,487 |
| 2017 | 1,850 |
| 2018 | 1,405 |
| 2019 | 4,332 |
| 2020 | 2,256 |
Maine's Counties
| County | Confirmed cases | Share of state |
|---|---|---|
| Cumberland County | 4,107 | 18.7% |
| York County | 3,669 | 16.7% |
| Kennebec County | 2,188 | 10.0% |
| Knox County | 1,530 | 7.0% |
| Hancock County | 1,402 | 6.4% |
| Lincoln County | 989 | 4.5% |
| Androscoggin County | 920 | 4.2% |
| Waldo County | 895 | 4.1% |
| Sagadahoc County | 787 | 3.6% |
| Penobscot County | 737 | 3.4% |
| Oxford County | 526 | 2.4% |
| Somerset County | 397 | 1.8% |
| Washington County | 218 | 1.0% |
| Franklin County | 190 | 0.9% |
| Aroostook County | 60 | 0.3% |
| Piscataquis County | 39 | 0.2% |
| Unknown County | 3,309 | 15.1% |
"Unknown County" counts cases the CDC confirmed in Maine 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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