The role of bacterial biofilm in persistent infections and control strategies

Li Chen1, Yu-mei Wen

  • 1Key Laboratory of Medical Molecular Virology of Ministry of Education and Ministry of Public Health, Shanghai Medical School of Fudan University, Shanghai 200032, China. lichen_bk@fudan.edu.cn

Insights

Bacterial biofilms cause persistent infections by resisting drugs and triggering inflammation. This review covers biofilm formation and strategies for developing new biofilm inhibitors.

Area of Science:

  • Microbiology
  • Infectious Diseases
  • Biomedical Engineering

Background:

  • Bacterial biofilms are a significant cause of persistent infections, often associated with medical implants.
  • Microbes form biofilms on living and non-living surfaces, creating a protective matrix of extracellular substances.
  • Biofilm formation in hosts can lead to antibiotic resistance and chronic inflammation.

Purpose of the Study:

  • To review the clinical significance of bacterial biofilm formation.
  • To discuss current and emerging strategies for inhibiting biofilm development and persistence.

Main Methods:

  • Literature review of studies on bacterial biofilms and infection.
  • Analysis of clinical implications and therapeutic approaches.
  • Synthesis of information on biofilm structure, resistance mechanisms, and inhibition strategies.

Main Results:

  • Biofilms contribute to the recalcitrance of many bacterial infections.
  • Drug resistance and host inflammatory responses are key challenges posed by biofilms.
  • Various strategies, including antimicrobial agents and physical disruption, are being explored to combat biofilms.

Conclusions:

  • Understanding biofilm formation is crucial for managing persistent bacterial infections.
  • Development of effective biofilm inhibitors is essential for improving patient outcomes.
  • Further research into novel anti-biofilm strategies is warranted.

Related Concept Videos

Biofilms01:29

Biofilms

Biofilms are complex communities of microorganisms encased in a self-produced extracellular polysaccharide matrix attached to surfaces. These microbial consortia can include single or multiple species, providing enhanced survival benefits by forming organized, multilayered structures.The formation of biofilms occurs through four key stages: attachment, colonization, development, and dispersal.During attachment, free-swimming planktonic cells adhere to a surface, often facilitated by...
Biological Methods for Microbial Control01:28

Biological Methods for Microbial Control

Biological agents offer an effective means of controlling microbial growth by leveraging natural processes like predation, competition, and the secretion of antimicrobial substances.Predatory bacteria such as Bdellovibrio species target and kill pathogens like Salmonella and E. coli. They are widely used in poultry farms to control infections. Myxococcus species help combat plant-pathogenic fungi. These naturally occurring predators serve as eco-friendly alternatives to chemical pesticides and...
Colonisation of Pathogens01:25

Colonisation of Pathogens

Pathogen colonization of host tissues is a critical step in the development of infectious diseases. Various pathogenic microorganisms, including bacteria, fungi, viruses, and protozoa, have evolved complex strategies to attach to, invade, and persist within host environments. These mechanisms enable pathogens to establish infections, evade immune responses, and resist antimicrobial treatments.Attachment to Host CellsIn bacteria, colonization typically begins with adherence to host epithelial...
Determinants of Bacterial Pathogenicity and Virulence01:20

Determinants of Bacterial Pathogenicity and Virulence

Pathogenic bacteria employ a variety of strategies to establish infections, including the secretion of extracellular enzymes that act as potent virulence factors. These enzymes facilitate bacterial colonization of host tissues and help evade immune surveillance. By targeting structural components of host tissues and interfering with immune mechanisms, these enzymes play a pivotal role in disease progression.Extracellular Enzymes Facilitating Tissue Invasion: Several bacterial pathogens secrete...
Gene Regulation in Microbial Communities: Quorum Sensing01:28

Gene Regulation in Microbial Communities: Quorum Sensing

Quorum sensing is a mechanism of bacterial communication that enables coordinated gene expression in response to changes in population density. This facilitates collective behaviors that enhance survival, resource acquisition, and ecological adaptation. This process relies on small signaling molecules called autoinducers that accumulate as bacterial populations grow. When a critical threshold concentration of autoinducers is reached, bacterial cells collectively modify gene expression,...
Bacterial Signaling01:30

Bacterial Signaling

Bacterial signaling can occur within bacteria (intracellular) or between bacteria (intercellular). At times, a group of bacteria behaves like a community. To achieve this, they engage in quorum sensing, the perception of higher cell density that causes changes in gene expression. Quorum sensing involves both extracellular and intracellular signaling. The signaling cascade starts with a molecule called an autoinducer (AI). Individual bacteria produce AIs that move out of the bacterial cell...