Antibacterial and antibiofilm activities of taxifolin against vancomycin-resistant S. aureus (VRSA)


  • Nisreen A. Abid Department of Microbiology, College of Medicine, University of Karbala, Karbala, Iraq
  • Entisar M. Hamad Department of Nursing, Technical Institute of Baquba, Middle Technical University, Baqubah 32001, Iraq
  • Musaab A. Ibrahim Baquba Teaching Hospital, Iraqi Ministry of Health, Baqubah 32001, Iraq
  • Hussein Abid Medical Laboratory Technology Department, Technical Institute of Baquba, Middle Technical University, Baqubah 32001, Iraq



antibacterial, biofilm, resazurin, Staphylococcus aureus, taxifolin


Background and objective: The medicinal effects of flavonoids are widely described in the literature; however, their antimicrobial effects against antibiotic resistant bacteria are yet to be highlighted. This study was aimed at investigating the growth and biofilm inhibitory effects of taxifolin, a flavonoid, against vancomycin-resistant Staphylococcus aureus (VRSA).

Methods: Seven VRSA isolates were used to assess the antimicrobial and antibiofilm influence of taxifolin. The agar-well diffusion method was used to determine the zones of inhibition caused by taxifolin, and resazurin-based microdilution technique was used to assess the minimum inhibitory concentration. Crystal violet staining technique was used to assess the biomass of biofilms formed by the microorganisms. GraphPad Prism software was used to present the data in figures.

Results: Taxifolin inhibited bacterial growth in a dose-dependent fashion and reduced bacterial viability. It similarly attenuated the biofilm production activity of bacterial isolates in a dose-dependent manner.

Conclusions: Current findings suggest the antibacterial and antibiofilm influence of taxifolin against VRSA in a dose-dependent manner.


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How to Cite

Abid, N., Hamad, E., Ibrahim, M., & Abid, H. (2022). Antibacterial and antibiofilm activities of taxifolin against vancomycin-resistant S. aureus (VRSA). Baghdad Journal of Biochemistry and Applied Biological Sciences, 3(04), 262–272.


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