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

Betts, JW, Kelly, SM and Haswell, SJ (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). pp. 421-425.

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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.

Item Type: Article
Authors :
NameEmailORCID
Betts, JWjono.betts@surrey.ac.ukUNSPECIFIED
Kelly, SMUNSPECIFIEDUNSPECIFIED
Haswell, SJUNSPECIFIEDUNSPECIFIED
Date : 1 August 2011
Identification Number : https://doi.org/10.1016/j.ijantimicag.2011.07.006
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 10:44
Last Modified : 17 May 2017 14:52
URI: http://epubs.surrey.ac.uk/id/eprint/828998

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