Synergistic Effect between Usnic Acid and Polymyxin B against Resistant Clinical Isolates of Pseudomonas aeruginosa

Table 2

Antimicrobial activity of usnic acid against clinical isolates of Acinetobacter baumannii and Pseudomonas aeruginosa.

Clinical isolates	Identification of the bacteria	MIC of usnic acid (μg/mL)
A15	Acinetobacter spp.	>500
A25	Acinetobacter spp.	>500
A71	Acinetobacter spp.	>500
A72	Acinetobacter spp.	>500
A76	Acinetobacter spp.	>500
PA05	Pseudomonas aeruginosa	500
PA07	Pseudomonas aeruginosa	500
PA18	Pseudomonas aeruginosa	500
PA19	Pseudomonas aeruginosa	500
PA46	Pseudomonas aeruginosa	250
PA56	Pseudomonas aeruginosa	250
PA57	Pseudomonas aeruginosa	500
PA78	Pseudomonas aeruginosa	500
PA82	Pseudomonas aeruginosa	250

MIC: minimum inhibitory concentration.