IMR Press / FBS / Volume 10 / Issue 2 / DOI: 10.2741/S517

Frontiers in Bioscience-Scholar (FBS) is published by IMR Press from Volume 13 Issue 1 (2021). Previous articles were published by another publisher on a subscription basis, and they are hosted by IMR Press on as a courtesy and upon agreement with Frontiers in Bioscience.


Activity of maltodextrin and vancomycin against staphylococcus aureus biofilm

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1 Instituto de Investigacion Sanitaria Gregorio Maranon, Madrid, Spain
2 Department of Clinical Microbiology and Infectious Diseases, Hospital General Universitario Gregorio Maranon, Madrid, Spain
3 Biology Department, School of Biology, Universidad Complutense de Madrid, Madrid, Spain

*Author to whom correspondence should be addressed.

Front. Biosci. (Schol Ed) 2018, 10(2), 300–308;
Published: 1 January 2018
(This article belongs to the Special Issue Microbial biofilm: when unity is strength)

We aimed to assess the anti-biofilm activity of vancomycin, maltodextrin, and their combination against vancomycin resistant Staphylococcus aureus (VRSA) and vancomycin-susceptible S. aureus (VSSA) strains based on an in vitro static model. Biofilms of 4 VSSA and 2 VRSA strains were grown in a 96-well static model. Vancomycin 2 mM, maltodextrin 10 mM, and both in combination were tested using tetrazolium salt (XTT), resazurin, and cfu/well counts. The efficacy of the antimicrobial solutions was expressed as the percentage reduction in metabolic activity with each method. Overall percentage reduction in the metabolic activity of VSSA was 79.3%, 34%, and 75.7% for vancomycin, maltodextrin, and their combination (p<0.001). Overall percentage reduction in metabolic activity of VRSA was 46.7%, 27.8%, and 34.6% for vancomycin, maltodextrin, and their combination (p>0.05). Maltodextrin did not improve the anti-biofilm efficacy of vancomycin in VSSA or in VRSA biofilms. XTT cannot replace cfu counts as a means of quantifying cell viability. Futures studies are needed to assess the synergistic effects of other non-antimicrobial molecules combined with vancomycin.

Catheter-Related Bloodstream Infection
Lock Therapy
Metabolic Activity
Staphylococcus Aureus
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