Fig. 7.

Investigation of the drug resistant (dr) bacterial cells isolated from the hospital environment and attached on the 10 min etched Al 5052 alloy. SEM images of dr E. coli cells on the control and etched surface; dr K. pneumoniae cells on the control and etched surface; dr P. aeruginosa cells on the control and etched surface are shown. Viability analysis of the drug resistant bacterial cells on the control and etched surfaces (bottom). Statistically significant differences (p < 0.01) compared to the control Al 5052 alloy are indicated by the symbol **.