Fig. 6.

SEM images of 48-h-old P. aeruginosa PS-1 biofilm before and after 24 h of treatment with MIC level of POM/ROS/CDZ combination. 1 and 2, images of untreated 48-h-old P. aeruginosa PS-1 biofilm; 3 and 4, images of 48-h-old P. aeruginosa PS-1 biofilm after 24 h of treatment with MIC level of POM/ROS/CDZ combination. a PS-1 micro-colonies; b extracellular polymeric substance; c bacterial cell of PS-1 capsulated by fibrous matrixes; d water channels; e Bacterial cell of PS-1 capsulated by fibrous matrixes; f destructed PS-1 biofilm after 24 h of combination treatment; g a few number of bacterial cells remained after 24 h of combination treatment; h damaged bacterial cell walls remained after 24 h of combination treatment