Fig. 4. Antibacterial properties of CS/PEG/PHMB hydrogels. (a) Photograph of bacteriostatic circles of CS/PEG/PHMB hydrogels loaded with different concentrations of PHMB after incubation with S. aureus for 24 h. (b) Photographs of the colonies of S. aureus. (c) Width of bacteriostatic circles of CS/PEG/PHMB hydrogels. (d) Numbers of bacterial colonies of different samples. (e) Antibacterial efficiency of the samples against S. aureus. The data represent mean ± SD and these experiments were repeated 3 times.
