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Ehrlichia

noun

Ehr·​lich·​ia er-ˈlik-ē-ə How to pronounce Ehrlichia (audio)
: a genus of gram-negative nonmotile bacteria that are transmitted chiefly by tick bites and are intracellular parasites of humans and animals infecting the cytoplasm especially of circulating white blood cells (such as monocytes and granulocytes) see ehrlichiosis

Cite this Entry

“Ehrlichia.” Merriam-Webster.com Medical Dictionary, Merriam-Webster, https://www.merriam-webster.com/medical/Ehrlichia. Accessed 26 Nov. 2025.

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