Table 2

Minimal bactericidal antibiotic concentration for P. aeruginosa biofilms grown for 24 h in microtiter trays with or without dialyzed salmon sperm DNA in the medium

StrainDNAMBC-Ba
TobramycinGentamicin
Wild type19 (2.0)33 (1.4)
Wild type+62 (3.8)72 (5.8)
pmr mutant15 (1.3)NA
pmr mutant+52 (5.8)NA
lasR rhlR mutant18 (0.7)NA
lasR rhlR mutant+53 (1.4)NA
  • a Averages (μg/ml) and standard deviations (in brackets) from three measurements are shown. NA, not applicable.