erythema migrans

erythema mi·​grans | \ -ˈmī-grənz How to pronounce erythema migrans (audio) \
variants: or erythema chronicum migrans \ -​ˌkrä-​nə-​kəm-​ How to pronounce erythema migrans (audio) \

Definition of erythema migrans

: a red spreading annular skin lesion that is an early symptom of Lyme disease and that develops at the site of the bite of a tick (such as the deer tick) infected with the causative spirochete

Examples of erythema migrans in a Sentence

Recent Examples on the Web In 70-80% of cases, the CDC also reports that people will experience an erythema migrans (EM) rash—a rash that typically in a bulls-eye shape, feels warm to the touch, and gradually expands over the course of a few days. Maggie O'neill,, "Amy Schumer Just Revealed She Has Lyme Disease in a New Instagram Post," 8 Sep. 2020 That’s especially true if patients don’t have the bullseye rash— known medically as erythema migrans—characteristic of Lyme disease. Carrie Arnold, Popular Science, "COVID-19 testing problems are all too familiar to Lyme disease patients," 28 June 2020 Typical symptoms include fever, headache, fatigue, and a characteristic skin rash called erythema migrans. Rosy Cordero,, "Justin Bieber confirms he's battling and 'overcoming' Lyme disease," 8 Jan. 2020 Then, an ecologist doing field studies saved the tick that bit him where an erythema migrans formed. Allen Steere,, "Lyme disease: How we discovered it and where we go from here," 22 Aug. 2019 Early in the infection people may experience fever, headache, fatigue, swollen glands or a skin rash called erythema migrans, or a bull’s eye. Andrea K. Mcdaniels,, "Ask the expert: With Lyme disease on the rise, here's how you can protect yourself," 3 July 2018 The most notable early symptom is a (non-itchy) rash that resembles a bull's-eye (erythema migrans) and can expand to as large as 12 inches in diameter over the course of several days. Emma Sarran Webster, Allure, "What You Should Know About the Rise of Insect-Spread Diseases," 3 May 2018

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'erythema migrans.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of erythema migrans

1979, in the meaning defined above

History and Etymology for erythema migrans

New Latin, literally, (chronic) migrating erythema

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Time Traveler for erythema migrans

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The first known use of erythema migrans was in 1979

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Cite this Entry

“Erythema migrans.” Dictionary, Merriam-Webster, Accessed 24 Jan. 2021.

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More Definitions for erythema migrans

erythema migrans


Medical Definition of erythema migrans

: a spreading annular erythematous skin lesion that is an early symptom of Lyme disease and that develops at the site of the bite of a tick (as the deer tick) infected with the causative spirochete

called also erythema chronicum migrans

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