Adhesive density of E. coli MG1655 (with flagella) and E. coli MG1655 ΔfliC (without flagella) grown on LB culture medias without and with the starvation for 2 and 7 days on PP (a), PE (b), PVC (c), PU (d), PET (e), and PS (f) plastics under 25 mM NaCl solution conditions. Error bar indicates standard deviation of measurements (n ≥ 3). The significant differences are indicated with *P < 0.05, **P < 0.01.