Antibacterial effects of theaflavin and synergy with epicatechin against clinical isolates of Acinetobacter baumannii and Stenotrophomonas maltophilia

Betts, J. W.; Kelly, S. M.; Haswell, S. J.

Abstract

Stenotrophomonas maltophilia and Acinetobacter baumannii are recognised as important nosocomial pathogens; however, due to their intrinsic resistance to multiple antibiotics, treatment options are limited. Polyphenols from black tea have been shown to possess antibacterial action. In this study, the antibacterial effects of various concentrations of theaflavin as well as combinations of theaflavin and epicatechin were determined using the disk diffusion assay. The results showed strong antibacterial activity of theaflavin against eight clinical isolates of S. maltophilia and A. baumannii. Significant synergy (P ≤ 0.05) was also observed between theaflavin and epicatechin against all isolates. Although the mechanisms for this activity and synergy are not well understood, the clinical potential is clear and further research is recommended to determine the modes of action.

Citation

Betts, J. W., Kelly, S. M., & Haswell, S. J. (2011). Antibacterial effects of theaflavin and synergy with epicatechin against clinical isolates of Acinetobacter baumannii and Stenotrophomonas maltophilia. International journal of antimicrobial agents, 38(5), 421-425. https://doi.org/10.1016/j.ijantimicag.2011.07.006

• Journal Article Type: Article
• Acceptance Date: Jul 14, 2011
• Online Publication Date: Aug 31, 2011
• Publication Date: 2011-11
• Journal: INTERNATIONAL JOURNAL OF ANTIMICROBIAL AGENTS
• Print ISSN: 0924-8579
• Electronic ISSN: 1872-7913
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 38
• Issue: 5
• Pages: 421-425
• DOI: https://doi.org/10.1016/j.ijantimicag.2011.07.006
• Keywords: Antibacterial; Theaflavin; Epicatechin; Polyphenol; Synergy; Acinetobacter baumannii; Stenotrophomonas maltophilia
• Public URL: https://hull-repository.worktribe.com/output/424106
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S0924857911003153?via%3Dihub#!