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Biofilm-Forming Methicillin-Resistant Staphylococcus aureus: A Comprehensive Phenotypic and Genotypic Review.
Sejal R Bhujugade1, Harsha V Patil1, Satish R Patil1
1Department of Microbiology, Krishna Institute of Medical Sciences, Krishna Vishwa Vidyapeeth (Deemed to be University), Karad, IND.
Cureus
|June 15, 2026
Summary
Methicillin-resistant Staphylococcus aureus (MRSA) forms biofilms, enhancing its survival and resistance. Understanding MRSA biofilm genetics and phenotypes is key to developing new treatments against these persistent infections.
Area of Science:
- Microbiology
- Infectious Diseases
- Molecular Biology
Background:
- Methicillin-resistant Staphylococcus aureus (MRSA) is a significant global pathogen.
- MRSA biofilms enhance antimicrobial tolerance, virulence, and persistence.
- Biofilms are microbial communities encased in extracellular polymeric substances.
Purpose of the Study:
- To review current knowledge on MRSA biofilm phenotypes and genotypes.
- To highlight the molecular mechanisms regulating MRSA biofilm formation.
- To discuss the clinical significance and therapeutic strategies for MRSA biofilms.
Main Methods:
- Review of existing literature on MRSA biofilm formation.
- Analysis of genetic networks (ica operon, agr, sarA, sigB) regulating biofilms.
- Examination of phenotypic (Congo red agar, microtiter plate, tube test) and genotypic (PCR) assays.
Main Results:
- MRSA biofilm formation is regulated by complex genetic networks.
- Phenotypic and genotypic assays provide insights into biofilm capacity and virulence.
- MRSA biofilms contribute to challenging clinical infections like device-related infections and chronic wounds.
Conclusions:
- MRSA biofilms pose a significant clinical challenge due to enhanced tolerance and persistence.
- Understanding the molecular basis of MRSA biofilms is crucial for effective treatment.
- Emerging therapeutic strategies offer potential alternatives to conventional antibiotics.
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