BIOFILM FORMATION STAGES

Biofilm formation is a dynamic and highly organized process that enables microorganisms to survive under unfavorable environmental conditions and resist antimicrobial treatment. Biofilms consist of microbial communities embedded within a self-produced extracellular polymeric substance (EPS) matrix that protects cells from antibiotics, disinfectants, and host immune responses. This study reviews the sequential stages of biofilm formation, including reversible attachment, irreversible adhesion, microcolony formation, maturation, and dispersion. The biological mechanisms underlying each stage, such as bacterial adhesion, EPS production, quorum sensing, and differential gene expression, are discussed together with their contribution to microbial persistence and antimicrobial resistance. The review also highlights the clinical significance of biofilm-associated infections, particularly those involving chronic wounds, implanted medical devices, urinary catheters, prosthetic joints, and cardiovascular implants. Recent advances in anti-biofilm strategies, including quorum sensing inhibitors, antimicrobial peptides, bacteriophage therapy, nanotechnology-based drug delivery systems, and enzymatic degradation of the biofilm matrix, are briefly summarized. A comprehensive understanding of biofilm development provides valuable insights into the prevention and management of persistent microbial infections and supports the development of more effective therapeutic approaches for combating biofilm-related diseases. (PMC⁠)