TABLE 1

Summary of statistically significant differences in the characteristics of P. aeruginosa ATCC 39324 biofilms grown in ASM+, ASM, or LB medium and their killing by antimicrobials (taking tobramycin, colistin, and the antimicrobial peptide AA-230 together)

Biofilm characteristicDifferencea
Matrix eDNAASM+ = ASM > LB
Matrix polysaccharidesASM+ > ASM = LB
Stress relaxation time
    <0.75 sLB > ASM > ASM+
    0.75 s to <3 sASM+ > ASM > LB
    3 s to <10 sASM+ > LB; ASM+ = ASM; LB = ASM
    10 s to <25 sASM+ > LB; ASM+ = ASM; LB = ASM
Antimicrobial killingLB > ASM ≥ ASM+
  • a =, no significant difference; >, significant difference (P < 0.05).