Fig. 2

Grazing ability of the long-term exposed amoeba E3 group. The Y-axis is the count of the colony-forming units of the living E. coli DH5α remaining in the medium. E3: E. coli DH5α cocultured with Acanthamoeba E3 group; m: only E. coli DH5α in medium; n: E. coli DH5α cocultured with normally cultured ATCC_30010; s: E. coli DH5α cocultured with 24-hour starved ATCC_30010 strain. The significant differences were determined by two-way ANOVA and are indicated by asterisks (ns: nonsignificant, **: P value < 0.01, ***: P value < 0.001)