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  • Title: Antimicrobial activity of Citrox bioflavonoid preparations against oral microorganisms.
    Author: Hooper SJ, Lewis MA, Wilson MJ, Williams DW.
    Journal: Br Dent J; 2011 Jan 08; 210(1):E22. PubMed ID: 21217705.
    Abstract:
    BACKGROUND: Citrox is a formulation of soluble bioflavonoids obtained from citrus fruits. The non-toxic and antimicrobial properties of natural bioflavonoids are well documented, and consequently there has been interest in the therapeutic application of these substances. OBJECTIVE: To determine the antimicrobial activity of two Citrox formulations (BC30 and MDC30) with different bioflavonoid combinations against a range of oral microorganisms. METHODS: The antimicrobial activity of both formulations was tested against 14 bacterial species and six Candida species. The two Citrox formulations (dilution range 0.007-8% v/v) were firstly evaluated by determining the in vitro Minimal Inhibitory Concentration (MIC) against planktonic microorganisms in a broth microdilution assay. Secondly, the ability of the same serial dilutions to inhibit microbial growth was assessed in a modified microtitre biofilm assay. RESULTS: Both Citrox formulations exhibited antimicrobial activity. The BC30 formulation demonstrated greater activity than MDC30 and significantly inhibited growth of all bacterial species and most candidal species tested at a concentration of 1% (v/v) in both the broth and the biofilm assay. CONCLUSION: Bioflavonoid preparations of Citrox have a broad-spectrum of antimicrobial activity against oral microorganisms, and as such have the potential to be used within therapeutic preparations for the control of the oral microflora.
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