Open AccessAnti-Biofilm Effect of Octenidine and Polyhexanide on Uropathogenic Biofilm-Producing Bacteria
Author(s) -
Maria Loose,
Kurt G. Naber,
Larry C. Purcell,
Manfred P. Wirth,
Florian M. E. Wagenlehner
Publication year - 2021
Publication title -
urologia internationalis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.771
H-Index - 53
eISSN - 1423-0399
pISSN - 0042-1138
DOI - 10.1159/000512370
Subject(s) - microbiology and biotechnology , biofilm , proteus mirabilis , escherichia coli , minimum bactericidal concentration , bacteria , pseudomonas aeruginosa , minimum inhibitory concentration , biology , chemistry , antimicrobial , biochemistry , genetics , gene
Background: A catheter allowing a release of antibacterial substances such as antiseptics into the bladder could be a new way of preventing biofilm formation and subsequent catheter-associated urinary tract infections. Methods: Minimal inhibitory and bactericidal concentration (MIC/MBC) determinations in cation-adjusted Mueller-Hinton broth and artificial urine were performed for 4 antiseptics against 3 uropathogenic biofilm producers, Escherichia coli , Pseudomonas aeruginosa , and Proteus mirabilis . Furthermore, effects of octenidine and polyhexanide against catheter biofilm formation were determined by quantification of biofilm-producing bacteria. Results: Sodium hypochlorite showed MIC/MBC values between 200 and 800 mg/L for all strains tested. Triclosan was efficient against E. coli and P. mirabilis (MIC ≤2.98 mg/L) but ineffective against P. aeruginosa . Octenidine and polyhexanide showed antibacterial activity against all 3 species tested (MIC 1.95–7.8 and 3.9–31.25 mg/L). Both octenidine and polyhexanide were able to prevent biofilm formation on catheter segments in a concentration dependent manner. Furthermore, adding 250 mg/L of each biocide disrupted biofilms formed by E. coli and P. mirabilis , whereas even 500 mg/L was not sufficient to completely destroy P. aeruginosa biofilms. Conclusion: Octenidine- and polyhexanide-containing antiseptics showed a broad effect against typical uropathogenic biofilm producers even in high dilutions. This study provides a basis for further investigation of the potential of octenidine and polyhexanide as prophylaxis or treatment of catheter biofilms.