Bacterial biofilm on catheter surface (null)

Molecular Classification

Other (process/phenomenon, not a molecule)

Other Names

Bacterial catheter biofilm, Catheter-associated biofilm, Catheter biofilm

Disease Roles

InfectionChronic infectionCatheter-associated urinary tract infection (CAUTI)

Bacterial biofilm on catheter surface Overview

Bacterial biofilm formation on catheter surfaces is a complex, multistep process by which bacteria adhere, proliferate, and secrete an extracellular matrix that encases them on the surface of medical devices such as urinary or intravenous catheters. This biofilm provides significant survival advantages to bacteria, including protection from host immune responses and antibiotics, facilitating persistent and recurrent device-associated infections. Common bacteria involved include *Escherichia coli*, *Staphylococcus epidermidis*, *Pseudomonas aeruginosa*, *Klebsiella pneumoniae*, *Enterococcus faecalis*, and *Proteus mirabilis*. Biofilm-associated infections are clinically important due to their resistance to standard therapies and their contribution to device failure and morbidity.

Mechanism of Action

Disruption of bacterial cell wall synthesis (for antibiotics); Interference with biofilm structural integrity (by novel coatings, antimicrobials)

Biological Functions

Microbial colonization

Surface adhesion

Extracellular matrix production

Antimicrobial resistance

Nutrient acquisition

Disease Associations

Infection

Chronic infection

Catheter-associated urinary tract infection (CAUTI)

Device-associated infection

Safety Considerations

High resistance to standard antibiotics
Difficulty of eradication
Risk of recurrent or persistent infection
Selection for multidrug-resistant organisms

Interacting Drugs

Antibiotics (e.g., amdinocillin, others as attempted in therapy)

None directly targets the “biofilm” itself, but various agents are used in attempts at eradication