PetriKey

Bacterium

Enterococcus faecalis/faecium

Bile-esculin and VRE vocabulary

en-ter-oh-KOK-us fee-KAY-lis fee-see-um

Gram positivebacteriagram-positivecoccibile-esculinvanc-resistance

High-yield clue

Enterococcus links bile-esculin, salt-tolerance vocabulary, and VRE resistance concepts.

Overview

Enterococci are Gram-positive cocci used in study flows for bile-esculin vocabulary, hardy growth concepts, and VRE resistance framing.

Classification

  • Gram-positive
  • Cocci
  • Pairs or short chains
  • Enterococcus

Lab & identification clues

  • Catalase negative
  • Bile-esculin vocabulary
  • Salt-tolerance teaching concept

Associations

  • Healthcare-associated infection vocabulary
  • Urinary and bloodstream educational cases
  • VRE resistance concept

Commonly confused with

  • Streptococcus agalactiae
  • Viridans streptococci

Your notes

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.

OpenStax: Microbiology 2e organism classification foundationssourceNCBI Bookshelf: Medical Microbiology organism chapterssourceCDC: CDC disease and public-health topic pagessource