TABLE 3.

Mutation frequencies of S. aureus ATCC 25923.

RP2 (μg/mL)	Mutation frequency
	Ciprofloxacin				Tetracycline				Erythromycin
	2 MIC	4 MIC	8 MIC	16 MIC	2 MIC	4 MIC	8 MIC	16 MIC	2 MIC	4 MIC	8 MIC	16 MIC
0	5.5 × 10–8	3.9 × 10–8	1.8 × 10–8	<10–8	5.6 × 10–8	4.8 × 10–8	2.5 × 10–8	<10–8	6.9 × 10–8	5.1 × 10–8	3.5 × 10–8	<10–8
16	3.6 × 10–8	1.5 × 10–8	<10–8	<10–8	2.7 × 10–8	1.3 × 10–8	<10–8	<10–8	3.6 × 10–8	1.4 × 10–8	<10–8	<10–8
32	<10–8	<10–8	<10–8	<10–8	<10–8	<10–8	<10–8	<10–8	1.2 × 10–8	<10–8	<10–8	<10–8

The results presented correspond to the average of three independent assays.