Fig. 2.

Effect of PAA on K. pneumoniae strains as surface-fixed cells (a) and biofilm (b). Scatter Plot with each dot representing recovered CFUs for a replicate after 10 min exposure to PAA. Disinfection was defined as ≥ 5log₁₀ reduction in mean recoverable CFUs (dashed red line). The horizontal lines show the mean value for the respective replicates. In the biofilm model, 0.15% PAA, the concentration used in duodenoscope reprocessing, was not sufficient to achieve disinfection of the outbreak strain