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Reports of Lyme Disease in Montana (Unknown County)

25

Confirmed cases of Lyme disease in Unknown County (2000 to 2020).

That's 20.8% of Montana's 120 confirmed cases.

Yearly Breakdown of Lyme Cases in Unknown County

Confirmed cases reported to the CDC each year.
View as a table
Confirmed Lyme disease cases in Unknown County by year
Year Confirmed cases
2000 0
2001 0
2002 0
2003 0
2004 0
2005 0
2006 0
2007 0
2008 0
2009 0
2010 0
2011 0
2012 0
2013 7
2014 2
2015 1
2016 8
2017 3
2018 0
2019 4
2020 0
2000–2020
Confirmed cases
    Unknown County

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    Lyme Stats for Other Montana Counties

    Confirmed Lyme disease cases by county in Montana, 2000 to 2020
    County Confirmed cases Share of state
    Gallatin County 17 14.2%
    Flathead County 12 10.0%
    Missoula County 10 8.3%
    Yellowstone County 10 8.3%
    Lake County 6 5.0%
    Cascade County 4 3.3%
    Lewis and Clark County 4 3.3%
    Carbon County 3 2.5%
    Lincoln County 3 2.5%
    Madison County 3 2.5%
    Ravalli County 3 2.5%
    Custer County 2 1.7%
    Jefferson County 2 1.7%
    Park County 2 1.7%
    Silver Bow County 2 1.7%
    Beaverhead County 1 0.8%
    Big Horn County 1 0.8%
    Blaine County 1 0.8%
    Broadwater County 1 0.8%
    Daniels County 1 0.8%
    Deer Lodge County 1 0.8%
    Fergus County 1 0.8%
    Musselshell County 1 0.8%
    Powell County 1 0.8%
    Rosebud County 1 0.8%
    Sanders County 1 0.8%
    Sweet Grass County 1 0.8%
    Carter County 0 0.0%
    Chouteau County 0 0.0%
    Dawson County 0 0.0%
    Fallon County 0 0.0%
    Garfield County 0 0.0%
    Glacier County 0 0.0%
    Golden Valley County 0 0.0%
    Granite County 0 0.0%
    Hill County 0 0.0%
    Judith Basin County 0 0.0%
    Liberty County 0 0.0%
    McCone County 0 0.0%
    Meagher County 0 0.0%
    Mineral County 0 0.0%
    Petroleum County 0 0.0%
    Phillips County 0 0.0%
    Pondera County 0 0.0%
    Powder River County 0 0.0%
    Prairie County 0 0.0%
    Richland County 0 0.0%
    Roosevelt County 0 0.0%
    Sheridan County 0 0.0%
    Stillwater County 0 0.0%
    Teton County 0 0.0%
    Toole County 0 0.0%
    Treasure County 0 0.0%
    Valley County 0 0.0%
    Wheatland County 0 0.0%
    Wibaux County 0 0.0%
    Unknown County 25 20.8%

    "Unknown County" counts cases the CDC confirmed in Montana 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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