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Tickpedia/Diseases/Ehrlichia chaffeensis ehrlichiosis/History

Year-over-year

Ehrlichia chaffeensis ehrlichiosis cases over time

11,396 reported cases across 2 years of CDC surveillance.

Year-over-year

diseaseCountyYear.casesByYear

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Data

Surveillance data: CDC. Geographic centroids: US Census Bureau Gazetteer. One-liners and editorial copy: this project, with citations on every fact.

© 2026 Tickpedia contributors · MITNot medical advice — see about for the limits.