TABLE 2.
Recovery of heat-injured S. typhimurium with XLD agar, directly and with the agar underlay technique compared to plating on nonselective TSA
| Recovery method | Log CFU/mla
|
|
|---|---|---|
| S. typhimurium (ATCC 19585) | S. typhimurium (UNL 10636-97) | |
| TSA | 2.65 ± 0.27a | 2.49 ± 0.18a |
| XLD, direct | 1.89 ± 0.26b | 1.83 ± 0.20b |
| XLD, agar underlay | 2.65 ± 0.20a | 2.45 ± 0.19a |
a
Data represent means ± standard deviations of three measurements after heat treatment. Values followed by different letters are statistically different (P < 0.05).