Fig. 2

Extended surface retentivity of PHS facilitates prolonged anti-microbial activity. a Prolonged surface retentivity shown through representative digital images of bacteriological plates showing the zones of inhibition (demarcated with yellow broken circles) for S. epidermidis and S. aureus around the discs soaked in PHS. Discs soaked in standard hand sanitizer (+ ve control) did not have any such bacterial growth free surrounding zones. b Sustained anti-microbial activity resulting from protracted availability of PHS from the applied surface is represented through digital images of thumb prints containing agar plates. These prints were collected from three of the volunteers (who participated earlier) before and at 0. 30 and 60 min after sanitizing their thumbs with either standard hand sanitizer (+ ve control) or PHS