Zoliflodacin broth macrodilution MICs are determined and used as the starting point for both in vitro time-kill and postantibiotic-effect (PAE) tests. In vitro static time-kill studies are conducted with glass tubes (18 by 150 mm, without agitation) containing 10-mL volumes of cation-adjusted Mueller-Hinton broth with logarithmically growing cultures (starting inoculum of 1×10⁶ CFU/mL) against levofloxacin-susceptible and levofloxacin-resistant S. aureus. Zoliflodacin is tested at concentrations equivalent to 0.5, 1, 2, 4, and 8 times the MIC; samples are plated for colony counts at 0, 2, 4, 6, 8, and 24 h by using 100 μL aliquots spotted onto 25-ml sheep blood agar plates as described previously. Compounds are considered bactericidal at the lowest drug concentration that reduced viable organism counts by ≥3 log₁₀ in 24 h. Time-kill studies are conducted in duplicate; tests are combined, and mean values are reported^[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.

• [1]. Huband MD, et al. In vitro antibacterial activity of AZD0914, a new spiropyrimidinetrione DNA gyrase/topoisomerase inhibitor with potent activity against Gram-positive, fastidious Gram-Negative, and atypical bacteria. Antimicrob Agents Chemother. 2015 Jan;59(1):467-74.

487.44

C₂₂H₂₂FN₅O₇

1620458-09-4

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Room temperature in continental US; may vary elsewhere