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This article is part of the supplement: International Conference on Prevention & Infection Control (ICPIC 2011)

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Antibiotic susceptibility and architecture of Staphylococcis aureus and Staphylococcus epidermidis biofilms

DC Coraca-Huber1*, M Fille2, J Hausdorfer2, K Pfaller3 and M Nogler1

  • * Corresponding author: DC Coraca-Huber

Author Affiliations

1 Experimental Orthopedics, Medical University Innsbruck, Austria

2 Hygiene and Medical Microbiology, Medical University Innsbruck, Innsbruck, Austria

3 Histology And Embryology, Medical University Innsbruck, Innsbruck, Austria

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BMC Proceedings 2011, 5(Suppl 6):P199  doi:10.1186/1753-6561-5-S6-P199

The electronic version of this article is the complete one and can be found online at:

Published:29 June 2011

© 2011 Coraca-Huber et al; licensee BioMed Central Ltd.

This is an open access article distributed under the terms of the Creative Commons Attribution License (, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Introduction / objectives

The infection associated to metal surfaces or dead tissues like bone grafts, can be fatal for the patient and presents a major financial burden for the economy. The adhering bacteria in these cases can evade host defences by forming biofilms. For this reason, the prevention of bacterial colonization and control of implant associated infections are of special interest.


Growth of S.aureus and S. epidermidis biofilms in vitro for antibiotic susceptibility tests and investigation of architecture.


S. aureus and S. epidermidis biofilms were grown over MBEC® (modified microtiter plates). Antibiotic susceptibility tests were carried out using gentamicin, vancomycin, rifampicin, fosfomycin, clindamycin and linezolid. Cell counting, opacity density (OD620) and scanning electronic microscopic (SEM) analysis were carried out.


The counting of viable cells after antibiotic exposition and OD620 showed significant efficacy of rifampicin and gentamicin against S. epidermidis biofilms and rifampicin against S. aureus biofilms compared to other antibiotics. SEM images showed proteic material in contact with cells which can be related to the proteic membrane characteristic of the biofilms structure.


The method for the development of bacterial biofilm in vitro using MBEC® plates is efficient and relatively fast. Gentamicin and rifampicin are good candidates for control of implant associated infections.

Disclosure of interest

None declared.