Development, characterisation and evaluation of a simple polymicrobial colony biofilm model for testing of antimicrobial wound dressings.

In this model silver dressings were ineffective versus the whole colony biofilms but showed some recovery of activity versus the disrupted colony biofilm. The iodine wound dressing reduced the viability of all species below the level of detection. This suggests that mode of action of wound dressing should be considered for the type of biofilm challenge as should the clinical use e.g. debridement.