TABLE 2.

In vitro broth microdilution MIC in the presence of mucin or DNA^a

Antibiotic	In vitro conc.b	Resistance breakpointc	MIC media condition
			0% mucin	0.5% mucin	1% mucin	2% mucin	3% mucin	4% mucin
Tobramycin	300	≥8	1	4	4	8	16	32
Ciprofloxacin	300	≥2	0.5	0.5	0.5	0.5	0.5	0.5
Colistin	40	≥4	2	32	64	128	256	256
Polymyxin B	40	≥4	2	64	128	256	256	256

^a All antibiotic concentrations and MIC values are in μg/mL.

^b Antibiotic concentration used in this study.

^c CLSI breakpoints (60).