Eradication of biofilms formed by P. aeruginosa strains LES B58, AA2, AA44, and DK2. Control: no carbon source, no antibiotic; MA: 60 mM d,l-malic acid; CIP: 1.2 μg/ml ciprofloxacin; MA-CIP: 60 mM d,l-malic acid + 1.2 μg/ml ciprofloxacin; SA: 120 mM sodium acetate; CAZ: 12.48 μg/ml ceftazidime; SA-CAZ: 120 mM sodium acetate + 12.48 μg/ml ceftazidime. Values shown are the mean (n = 3). Error bars indicate standard error.