Bacterium
Rickettsia rickettsii
Obligate intracellular tick-borne bacterium
rih-KET-see-uh rih-KET-see-eye
High-yield clue
Obligate intracellular + tick vector + vasculitis/rash vocabulary.
Overview
An obligate intracellular bacterium used to teach tick-borne spotted fever vocabulary and endothelial-cell tropism concepts.
Classification
- Obligate intracellular bacterium
- Small Gram-negative concept
- Vector-borne
Lab & identification clues
- Serology vocabulary
- PCR term recognition
- Intracellular growth concept
Associations
- Rocky Mountain spotted fever vocabulary
- Endothelial injury concept
- Tick exposure framing
Commonly confused with
- Borrelia burgdorferi
- Ehrlichia/Anaplasma vocabulary
Frequently asked questions
What is Rickettsia rickettsii?
An obligate intracellular bacterium used to teach tick-borne spotted fever vocabulary and endothelial-cell tropism concepts.
What are the lab clues for Rickettsia rickettsii?
Lab clues for Rickettsia rickettsii include Serology vocabulary, PCR term recognition, and Intracellular growth concept.
What is Rickettsia rickettsii commonly confused with?
Rickettsia rickettsii is commonly confused with Borrelia burgdorferi and Ehrlichia/Anaplasma vocabulary.
Original student-study summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment, dosing, or specimen-handling guidance.