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Lyme disease

American  
[lahym] / laɪm /

noun

Pathology.
  1. an acute inflammatory disease caused by a tick-borne spirochete, Borrelia burgdorferi , characterized by recurrent episodes of decreasing severity in which joint swelling, fever, and rash occur, sometimes with cardiac or nervous system complications.


Lyme disease British  
/ laɪm /

noun

  1. a disease of domestic animals and humans, caused by the spirochaete Borrelia burghdorferi and transmitted by ticks, and variously affecting the joints, heart, and brain

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Lyme disease Scientific  
/ līm /
  1. A disease caused by the bacterial spirochete Borrelia burgdorferi, transmitted by deer ticks and characterized initially by a bull's-eye-shaped rash followed by flu-like symptoms such as fever, joint pain, and headache. If untreated, it can result in chronic arthritis and neurologic or cardiac dysfunction. It is named after Lyme, Connecticut, where it was first reported.


Lyme disease Cultural  
  1. An infection caused by a bacterium transmitted by the bite of a tick. If untreated, the disease can lead to, among other things, a serious form of chronic arthritis. Lyme disease is most prevalent in the wooded regions of the Northeast and the Middle West.


Etymology

Origin of Lyme disease

After Lyme, Conn., where it was first described

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

See Examples For:

With summer in full swing, health officials are warning of increasing risks from two of the most common tick-borne conditions: Lyme disease and alpha-gal syndrome.

From The Wall Street Journal Jul. 24, 2026

Marketers also claim thymosin-alpha, one of the more studied peptides, can help with immune function, Lyme disease and COVID-19.

From Salon Apr. 4, 2026

They play a vital role in the ecosystem, eating rodents, such as ground squirrels, that often carry diseases such as hantavirus, plague and Lyme disease.

From Los Angeles Times Apr. 1, 2026

Fewer Lyme disease cases occurred among the 9,400 subjects in the study than had been expected, causing it to fall short of one of the study’s key measures of statistical significance.

From The Wall Street Journal Mar. 23, 2026

Better established is Lyme disease, caused by a spirochete that we get from the bite of ticks carried by mice and deer.

From "Guns, Germs, and Steel: The Fates of Human Societies" by Jared M. Diamond

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