Fig. 1
From: Transcriptome changes and polymyxin resistance of acid-adapted Escherichia coli O157:H7 ATCC 43889
Survival of acid-adapted and non-adapted Escherichia coli in pH 2.75 of M9 media. ■, acid-adapted cells; △, non-adapted cells. The acid-adapted and non-adapted E. coli were grown in M9 media, pH 2.75, for 200 h. When the pH was 2.75, the acid-adapted cells survived for > 100 h of incubation. The inset figure shows the number of surviving acid-adapted E. coli after 100 h incubation with statistical significance (P < 0.001)