TABLE 1

CFU reduction

Antimicrobial agentaLog CFU reductionb under the following growth condition:
PlanktonicBiofilm
MaSmMaRgMaSmMaRg
H2O2 (mM)
    1<1<1<1<1
    5<1<1<1<1
    101.91.2<1<1
    50>7*>7*4.82.3
    100>7*>7*>7*6.2
HCl (pH)
    5.5NDND<1<1
    4.5NDND<1<1
    3.54.93.42.51.1
Amikacin (256 μg/ml)NDND<1<1
Azithromycin (256 μg/ml)NDND00
Acetic acid (%)
    2-h exposure
        15.341.31.3
        2.5>7*>7*>7*>7*
        5>7*>7*>7*>7*
    30-min exposure
        11<1<1<1
        2.5422.22.9
        5>7*>7*>7*>7*
  • a For all agents or stresses except acetic acid, the exposure time was 24 h.

  • b ND, no data; *, detection limit.