Table 2.

Protease activity of Pseudomonas aeruginosa cells

Samples	Proteolytic activity (units/106 bacteria/hour)
Planktonic	2.89 ± 0.47
Biofilm	4.44 ± 0.38*
Biofilm treated with (1/8) MIC of ciprofloxacin	5.33 ± 0.46*
Biofilm treated with (1/8) MIC amikacin	5.78 ± 0.61*
Biofilm treated with (1/8) MIC ceftazidime	5.10 ± 0.44*

Notes: n = 4 experiments.

^*indicates significant difference from the planktonic group at P < 0.05.

Abbreviation: MIC, minimum inhibitory concentration.