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Intracellular accumulation of ethidium bromide (EtBr) in A. baumannii ATCC 17978 after treatment with MIC of TC and EG, as measured by fluorescence intensity. A. baumannii ATCC 17978 was added with MIC of TC/EG or CCP (100 μM) and incubated for 5 h at 37°C. Fluorescence (excitation 530 nm and emission 645 nm) was measured after addition of EtBr (4 mg/l). Treatments with ∗ are significantly different from PBS (control) (P < 0.05).
