Concept
Quorum sensing
Cell-density chemical communication
KWOR-um SEN-sing
High-yield clue
Quorum sensing lets bacteria track their population density via autoinducers and switch on group behaviors like biofilm and virulence.
Overview
A cell-to-cell communication system in which bacteria secrete and detect signaling molecules (autoinducers) to sense population density and coordinate group behaviors. It regulates biofilm formation and virulence-factor expression.
Classification
- Cell-density signaling
- Autoinducer molecules
- Coordinated gene expression
- Population-level behavior
Lab & identification clues
- Acyl-homoserine-lactone (AHL) vocabulary
- LuxI/LuxR system concept
- Autoinducer-2 (AI-2) vocabulary
Associations
- Biofilm-formation coordination
- Virulence-factor timing
- Prominent in Pseudomonas study
Commonly confused with
- Lac operon regulation
- Two-component systems
Frequently asked questions
What is Quorum sensing?
A cell-to-cell communication system in which bacteria secrete and detect signaling molecules (autoinducers) to sense population density and coordinate group behaviors. It regulates biofilm formation and virulence-factor expression.
What is the high-yield clue for Quorum sensing?
Quorum sensing lets bacteria track their population density via autoinducers and switch on group behaviors like biofilm and virulence.
What is Quorum sensing associated with?
Quorum sensing is associated with Biofilm-formation coordination, Virulence-factor timing, and Prominent in Pseudomonas study.
What is Quorum sensing commonly confused with?
Quorum sensing is commonly confused with Lac operon regulation and Two-component systems.
Original microbiology concept summary. Sources checked: OpenStax Microbiology 2e, NCBI Bookshelf Medical Microbiology, and CDC/WHO topic pages where applicable; reviewed 2026-06. Educational only; no diagnosis, treatment selection, infection-control instructions, or specimen-handling guidance.