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Impact of growth temperature and agar versus liquid growth on the freeze-thaw tolerance of L. monocytogenes F2365 (A) and H7550 (B). The data represent the means from three experiments, each performed in duplicate. Symbols: •, liquid at 37°C; ○, liquid at 25°C; , liquid at 4°C; ▴, agar at 37°C; ▵, agar at 25°C; , agar at 4°C.
