» Articles » PMID: 35655208

The Effect of Fluoroquinolones and Antioxidans on Biofilm Formation by Proteus Mirabilis Strains

Abstract

Background: Fluoroquinolones are a group of antibiotics used in urinary tract infections. Unfortunately, resistance to this group of drugs is currently growing. The combined action of fluoroquinolones and other antibacterial and anti-biofilm substances may extend the use of this therapeutic option by clinicians. The aim of the study was to determine the effect of selected fluoroquinolones and therapeutic concentrations of ascorbic acid and rutoside on biofilm formation by Proteus mirabilis.

Materials And Methods: The study included 15 strains of P. mirabilis isolated from urinary tract infections in patients of the University Hospital No. 1 dr A. Jurasz in Bydgoszcz (Poland). The metabolic activity of the biofilm treated with 0.4 mg/ml ascorbic acid, 0.02 µg/ml rutoside and chemotherapeutic agents (ciprofloxacin, norfloxacin) in the concentration range of 0.125-4.0 MIC (minimum inhibitory concentration) was assessed spectrophotometrically.

Results: Both ciprofloxacin and norfloxacin inhibited biofilm formation by the tested strains. The biofilm reduction rate was correlated with the increasing concentration of antibiotic used. No synergism in fluoroquinolones with ascorbic acid, rutoside or both was found. The ascorbic acid and rutoside combination, however, significantly decreased biofilm production.

Conclusions: Our research proves a beneficial impact of ascorbic acid with rutoside supplementation on biofilm of P. mirabilis strains causing urinary tract infections.

Citing Articles

The SOS Response Activation and the Risk of Antibiotic Resistance Enhancement in spp. Strains Exposed to Subinhibitory Concentrations of Ciprofloxacin.

Zablotni A, Schmidt M, Siwinska M Int J Mol Sci. 2025; 26(1).

PMID: 39795976 PMC: 11720175. DOI: 10.3390/ijms26010119.


Fluoroquinolones and Biofilm: A Narrative Review.

Geremia N, Giovagnorio F, Colpani A, De Vito A, Botan A, Stroffolini G Pharmaceuticals (Basel). 2025; 17(12.

PMID: 39770514 PMC: 11679785. DOI: 10.3390/ph17121673.


Characteristics and Outcome of Vascular Graft Infections: A Risk Factor and Survival Analysis.

Stockschlader L, Margaryan D, Omran S, Schomaker M, Greiner A, Trampuz A Open Forum Infect Dis. 2024; 11(6):ofae271.

PMID: 38868303 PMC: 11167665. DOI: 10.1093/ofid/ofae271.


Potential antivirulence activity of sub-inhibitory concentrations of ciprofloxacin against Proteus mirabilis isolates: an in-vitro and in-vivo study.

Elhosseini M, El-Banna T, Sonbol F, El-Bouseary M Ann Clin Microbiol Antimicrob. 2024; 23(1):48.

PMID: 38802894 PMC: 11131287. DOI: 10.1186/s12941-024-00704-4.

References
1.
Mah T, OToole G . Mechanisms of biofilm resistance to antimicrobial agents. Trends Microbiol. 2001; 9(1):34-9. DOI: 10.1016/s0966-842x(00)01913-2. View

2.
Bernard F, Sable S, Cameron B, Provost J, Desnottes J, Crouzet J . Glycosylated flavones as selective inhibitors of topoisomerase IV. Antimicrob Agents Chemother. 1997; 41(5):992-8. PMC: 163839. DOI: 10.1128/AAC.41.5.992. View

3.
Mace S, Truelstrup Hansen L, Rupasinghe H . Anti-Bacterial Activity of Phenolic Compounds against Streptococcus pyogenes. Medicines (Basel). 2017; 4(2). PMC: 5590061. DOI: 10.3390/medicines4020025. View

4.
Syal K, Chatterji D . Vitamin C: A Natural Inhibitor of Cell Wall Functions and Stress Response in Mycobacteria. Adv Exp Med Biol. 2019; 1112:321-332. DOI: 10.1007/978-981-13-3065-0_22. View

5.
Scheld W . Maintaining fluoroquinolone class efficacy: review of influencing factors. Emerg Infect Dis. 2003; 9(1):1-9. PMC: 2873754. DOI: 10.3201/eid0901.020277. View