Overview
Gram-positive and Gram-negative bacteria are classified based on their cell wall structure, which significantly influences their staining properties and susceptibility to antibiotics. Gram-positive bacteria have a thick peptidoglycan layer that retains the crystal violet dye during Gram staining, ap...
Key Terms
Example: Gram-positive bacteria have a thick layer of peptidoglycan.
Example: Crystal violet stains Gram-positive bacteria purple.
Example: After safranin application, Gram-negative bacteria appear pink.
Example: The outer membrane makes Gram-negative bacteria more resistant.
Example: Some Gram-positive bacteria are known pathogens.
Example: Penicillin is an antibiotic effective against Gram-positive bacteria.
Related Topics
Antibiotic Mechanisms
Study how different antibiotics work against bacteria and their mechanisms of action.
intermediateBacterial Pathogenesis
Explore how bacteria cause diseases and the factors that contribute to their virulence.
advancedMicrobial Resistance
Learn about the various forms of microbial resistance and their implications for public health.
advancedKey Concepts
Cell wall structureGram stainingAntibiotic resistancePathogenicity