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Ehrlichiosis

Ehrlichiosis is the general name used to describe diseases caused by the bacteria Ehrlichia chaffeensis, E. ewingii, or E. muris eauclairensis in the United States. The majority of reported cases are due to infection by E. chaffeensis.

Ehrlichia chaffeensis in a white blood cell. Photo: Centers for Disease Control and Prevention.

Ehrlichia chaffeensis in a white blood cell. Photo: Centers for Disease Control and Prevention.


Page last reviewed/updated: January 2025