Table 2.

The susceptibility of the clinical isolates to antibiotics and haloamines

Bacterium

Resistant against*

Time for ≥3log reduction of c.f.u. ml (min)†

1 % NCT (55 mM)

0.001 % BAT (32 µM)

0.02 % NBrT (1 mM)

Imipenem, meropenem

15

1

None

15

1

None

>30‡

1

Cefuroxime, fosfomycin, cefotaxime, cefepime

15

1

None

30

1

Erythromycin

30

1

Penicillin, ampicillin

30

1

*Determined by agar diffusion tests according to European Committee on Antimicrobial Susceptibility Testing standards [ ].

tbl2fn2†Tests were done in 0.1M phosphate buffer at pH 7.1 and 37 °C; 1×10 c.f.u. ml were incubated in test solutions and quantitative cultures were assessed after inactivation of the antiseptics with 1 % methionine/1 % histidine.

tbl2fn3‡2 log reduction after 30 min.