title: Effect of oxazolidinone, RBx 7644 (ranbezolid), on inhibition of staphylococcal adherence to plastic surfaces.
abstract: Adhesion to biomaterial is assumed to be a crucial step in the pathogenesis of foreign body infection. Slime producing Staphylococcus epidermidis and Staphylococcus aureus have emerged as a preeminent cause of nosocomial bacteremia and infections of prosthetic medical devices. We evaluated the time-dependent anti-adhesive effect of RBx 7644 (ranbezolid), vancomycin, linezolid and quinupristin/ dalfopristin on two isolates each of S. epidermidis and S. aureus. Linezolid and quinupristin/ dalfopristin showed inhibition only at supra-inhibitory concentrations (2 and 4X MIC) following 2 and 4 h delayed treatment, whereas RBx 7644 demonstrated significant activity against adhesion of staphylococcal cells that had been treated with 2 to 6 h delay. When vancomycin treatment was delayed by 4 to 6 h, even concentrations above the MIC were unable to prevent adherence. This study indicates that RBx 7644 has anti-adhesion potential and may emerge as an important antibiotic for prevention and treatment of device-related infections caused by staphylococci.
authors.affiliation: Department of Infectious Diseases, Ranbaxy Research Laboratories, Gurgaon, Haryana, India. tarun.mathur@ranbaxy.com
authors.forename: T
authors.initials: T
authors.lastname: Mathur
authors.forename: S
authors.initials: S
authors.lastname: Singhal
authors.forename: S
authors.initials: S
authors.lastname: Khan
authors.forename: P
authors.initials: P
authors.lastname: Bhateja
authors.forename: M
authors.initials: M
authors.lastname: Pandya
authors.forename: A
authors.initials: A
authors.lastname: Rattan
authors.forename: P K
authors.initials: PK
authors.lastname: Bhatnagar
authors.forename: D J
authors.initials: DJ
authors.lastname: Upadhyay
authors.forename: T
authors.initials: T
authors.lastname: Fatma
mesh_terms: D000081:Acetamides / Q000494:pharmacology; D000900:Anti-Bacterial Agents / Q000494:pharmacology*; D001422:Bacterial Adhesion / Q000187:drug effects; D018441:Biofilms / Q000187:drug effects*; D004305:Dose-Response Relationship, Drug; D005663:Furans / Q000494:pharmacology*; D000069349:Linezolid; D008826:Microbial Sensitivity Tests; D010080:Oxazoles / Q000494:pharmacology*; D023303:Oxazolidinones / Q000494:pharmacology; D010969:Plastics; D013211:Staphylococcus aureus / Q000187:drug effects* / Q000254:growth & development; D013212:Staphylococcus epidermidis / Q000187:drug effects* / Q000254:growth & development; D013997:Time Factors; D014640:Vancomycin / Q000494:pharmacology; D014769:Virginiamycin / Q000494:pharmacology
chemical_list: D000081:Acetamides; D000900:Anti-Bacterial Agents; D005663:Furans; D010080:Oxazoles; D023303:Oxazolidinones; D010969:Plastics; C476340:ranbezolid; D014769:Virginiamycin; C062940:quinupristin-dalfopristin; D014640:Vancomycin; D000069349:Linezolid