Summary
This in vitro experimental study investigated the feasibility for marbofloxacin, a veterinary fluoroquinolone
antibiotic, to retain its antibacterial activity after its inclusion in polymethylmethacrylate
(PMMA) cement. The assays were conducted on gelose cultures of various types of bacteria
isolated from canine spontaneous osteomyelitis. The efficiency of the antibiotics
was assessed by using an antibiogram method. Resistance of marbofloxacin to the temperature
observed during PMMA polymerization, antimicrobial effect of galenic, useful concentrations
and comparison with gentamicin (reference antibiotic for this use) were evaluated.
Marbofloxacin retained its antimicrobial activity after being heated to high temperatures
reached during polymerization. The more effective galenic form to incorporate into
the PMMA monomer was the marbofloxacin powder and the appropriate concentration was
1/40°. In this experiment, marbofloxacin included in PMMA showed a good antimicrobial
activity; however this activity was lower than gentamicin added to PMMA on Gram +
and Pseudomonas bacteria.Therefore, it seems useful to incorporate marbofloxacin to
PMMA cement to treat, or to prevent, osteomyelitis associated with marbofloxacin sensitive
bacteria.Nevertheless, the development of a marbofloxacin-PMMA cement requires further
evaluation, especially pharmacological, biomechanical and clinical.
Keywords
Polymethylmethacrylate - marbofloxacin - osteomyelitis - orthopaedic cement