PetriKey

Antimicrobial

Lincosamides (clindamycin)

50S peptidyl-transferase blocker, anaerobe-active

lin-KOH-suh-mides

Gram positiveprotein-synthesis50sanaerobegram-positivemlsbcdiff

High-yield clue

Clindamycin binds the 50S subunit and shares the MLSb (erm-mediated) inducible resistance tested by the D-test.

Overview

A protein-synthesis class represented by clindamycin, studied for blocking the 50S peptidyl transferase center and for anaerobe and Gram-positive activity plus its inducible-resistance test concept.

Classification

  • Protein-synthesis inhibitor
  • Binds 50S ribosomal subunit
  • Bacteriostatic
  • Anaerobe and Gram-positive spectrum

Lab & identification clues

  • Inducible clindamycin resistance (D-test) vocabulary
  • MLSb / erm methylase resistance concept
  • Overlapping 50S binding site with macrolides

Associations

  • Toxin-suppression (anti-exotoxin) adjunct vocabulary
  • Clostridioides difficile association concept
  • Above-diaphragm anaerobe coverage vocabulary

Commonly confused with

  • Macrolides
  • Oxazolidinones (linezolid)

Your notes

Original mechanism summary for microbiology study. Sources checked: CDC antimicrobial-resistance guidance, NCBI Bookshelf Medical Microbiology, and standard coursework frameworks; reviewed 2026-06. Covers class, mechanism, and resistance vocabulary only; no prescribing, dosing, or patient-specific treatment guidance.

CDC: CDC antimicrobial resistance overview and threat reportssourceWHO: WHO bacterial priority pathogens list 2024sourceNCBI Bookshelf: Medical Microbiology antimicrobial mechanism foundationssource