Why does this kill bacteria ?

Why does this kill bacteria ?

Prevents bacterial cells forming cell walls – The cell wall stops bacterial cells swelling & bursting in solutions with less negative water potential than their cytoplasm. Without their cell wall, bacterial cells swell and burst in human plasma

resistant strains more likely to develop in hospitals lots of antibiotics are used in hospital ;

(patients ill) may have a weakened immune system ;

screen new patients for MRSA ;

isolate patients with MRSA ;

barrier nursing / explained ;

use of narrow spectrum antibiotics ;

make sure course of antibiotics completed ;

wash hands qualified ;

adequate cleaning qualified ;

AVP ;