Evaluation of MBEC™-HTP biofilm model for studies of implant associated infections.
The bacteria in implant-related infections can evade host defenses by forming biofilms. The more we understand biofilm behavior, the better we can fight against then clinically. In vitro models for biofilms allow tests simulating in vivo conditions. In this study we evaluated the Minimum Biofilm Eradication Concentration-High Throughput Plates (MBEC™-HTP) as biofilm in vitro model for studies of implant associated infections. Staphylococcus aureus and Staphylococcus epidermidis biofilms were grown on MBEC™-HTP. To ensure the biofilm formation, antibiotic susceptibility tests and scanning electron microscopy (SEM) was carried out. Susceptibility tests were carried out using gentamicin, vancomycin, rifampicin, fosfomycin, clindamycin, and linezolid. Colony forming units counting were carried out. Minimal inhibitory concentration (MIC) and biofilm inhibitory concentration (BIC) were estimated. The CFU counting showed potency of rifampicin and daptomycin against S. epidermidis biofilms and rifampicin against S. aureus biofilms. SEM images showed proteic material in contact with cells. The differences between BIC and MIC demonstrated the biofilm formation as well as the SEM images. Rifampicin and daptomycin are good choices against biofilm related infections. Moreover, after suggested modifications, the model used in this study is eligible to further studies of implant associated infections.
Experimental Orthopaedics, Medical University Innsbruck, Innsbruck, Austria. debora.coraca-huber@i-med.ac.at
Debora C
DC
Coraça-Hubér
Manfred
M
Fille
Johann
J
Hausdorfer
Kristian
K
Pfaller
Michael
M
Nogler
D000900:Anti-Bacterial Agents / Q000494:pharmacology; D018441:Biofilms / Q000187:drug effects / Q000254:growth & development*; D024881:Drug Resistance, Bacterial; D006801:Humans; D066298:In Vitro Techniques; D008855:Microscopy, Electron, Scanning; D016459:Prosthesis-Related Infections / Q000188:drug therapy / Q000382:microbiology* / Q000503:physiopathology*; D013203:Staphylococcal Infections / Q000188:drug therapy / Q000382:microbiology / Q000503:physiopathology; D013211:Staphylococcus aureus / Q000187:drug effects / Q000254:growth & development; D013212:Staphylococcus epidermidis / Q000187:drug effects / Q000254:growth & development
D000900:Anti-Bacterial Agents