FIG 2.

Heat resistance at 55°C of E. coli O157:H7 ATCC 35150 (A), ATCC 43889 (B), ATCC 43890 (C), and ATCC 43895 (D) cultured under LSMMG and NG conditions for 6 and 24 h. Log (N/N₀) values represent the mean ± standard error (SE) (n = 6). The lines denote predictions from linear regression (R² > 0.95). a and b, means of 24-h NG and LSMMG culture within each time point are significantly different when letters are different (P < 0.05). x and y, means of 6-h NG and LSMMG culture within each time point are significantly different when letters are different (P < 0.05).