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Antibacterial susceptibility of Staphylococcus aureus sequence types (ST) ST22 and ST30, at three different time points, freshly prepared, after six weeks of storage at 4 °C, and after 12 weeks of storage at 4 °C. LYSSTAPH-S and LYSDERM-S concentrations used: 800, 400, 200, 100, 50, 25 μg/mL. Clear zones were assessed as “+++”, zones with minimal bacterial growth as “++”, zones with substantial bacterial growth as “+”, and no visible zone as “-”.
