Table 2.

Viable counts of P. aeruginosa biofilm bacteria treated with NAC combined with ciprofloxacin (lg [CFU/cm²])

NAC (mg/ml)	ciprofloxacin (MIC)
	0	1/2	1	2	4	8
0	7.11 ± 0.34	6.96 ± 0.34	6.95 ± 0.31	6.84 ± 0.32	6.76 ± 0.29	6.60 ± 0.30
0.5	6.97 ± 0.31	6.70 ± 0.31	6.65* ± 0.33	6.40* ± 0.46	6.37* ± 0.33	6.06* ± 0.48
1	6.87 ± 0.34	6.58* ± 0.26	6.47* ± 0.33	6.23* ± 0.37	5.94* ± 0.56	5.62* ± 0.59
2.5	6.45* ± 0.27	6.22* ± 0.25	6.15* ± 0.26	6.03* ± 0.35	5.76* ± 0.58	5.05* ± 0.35

Note: n = 20 strains, *compared with NAC at 0 mg/ml and the same concentration of ciprofloxacin, P < 0.01