Reduction of Pseudomonas aeruginosa cfu observed in different treatment groups on various treatment days (5, 7, 11). *P < 0·05 compared with CSM‐FPEG, CSM and Tegaderm™ control groups; ▴P < 0·05 compared with CSM‐FPEG, SSD‐CSM, CSM and Tegaderm control groups; ‡P < 0·05 compared with Tegaderm control; †P < 0·05 compared with all other five treatment groups.