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Map shows which tick-borne disease is most common in your state

0 2 years ago

Tick season typically starts in early spring and lasts through fall in most regions of the US, causing flu-like illnesses that may have long-term health consequences.

Depending on where you live, the first signs of tick-borne illness can vary. At least nine different tick species in the US are capable of spreading disease, according to surveillance by the Centers for Disease Control and Prevention.

Overall, about 50,000 cases of various sicknesses linked to tick bites are reported to the CDC each year. Some tick-borne diseases are so rare that there are only a handful of reported cases nationwide each year, so Insider made a map featuring the most common tick-borne diseases.

Lyme disease is the most common sickness spread by ticks in the US, but the total number of cases is concentrated in regions where the black-legged tick thrives.

For the purpose of the map, Insider used different scales to describe the incidence of Lyme disease and Rocky Mountain spotted fever, another tick-borne disease. States were considered to have a high incidence of Lyme if they had 100 or more cases per million people in 2019, but the high-incidence baseline for spotted fevers was 50 cases per million people. States with fewer than 10 cases per million people for each disease are denoted in gray.

Lyme disease is most prevalent in the Northeast and Midwest

Cases of Lyme disease are typically reported in states where the tick species Ixodes scapularis looks for a host. Also known as the deer tick, this black-legged tick originated in the Northeast and has spread down the coast and to the Midwest as the climate has warmed.

Maine, Vermont, and New Hampshire reported between 800 and 1,200 cases per million people in 2019, which was the most recent year with complete surveillance data compiled by the CDC.

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