Research Article

Novel Antibiotic Combinations of Diverse Subclasses for Effective Suppression of Extensively Drug-Resistant Methicillin-Resistant Staphylococcus aureus (MRSA)

Figure 3

Time-Kill kinetics on antibiotics individually and collaterally. (a) Levofloxacin-ceftazidime combination with 8-fold growth reduction compared to most active monotherapy. (b) <2-log 10 difference in killing with amoxicillin-clavulanic acid-cephradine combination therapy compared to most active single treatment shows lack of synergy. (c) Amoxicillin-clavulanic acid-ofloxacin combination is collaterally indifferent as decrease in bacterial growth is <2-log 10. (d) Amoxicillin-clavulanic acid-tobramycin combination shows synergy because of >2-log 10 growth reduction. (e) Collateral sensitivity is shown in piperacillin-tazobactam-tobramycin combination.
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