TABLE 1.
Recovery of heat-injured E. coli O157:H7 with SMAC, directly and with the agar underlay technique, compared to plating on nonselective TSA
| Recovery method | Log CFU/mla
|
|
|---|---|---|
| E. coli O157:H7 (ATCC 35150) | E. coli O157:H7 (ATCC 43890) | |
| TSA | 2.85 ± 0.16a | 2.59 ± 0.18a |
| SMAC, direct | 1.76 ± 0.14b | 2.01 ± 0.06b |
| SMAC, agar underlay | 2.74 ± 0.20a | 2.49 ± 0.20a |
a
Data represent means ± standard deviations of three measurements after heat treatment. Values followed by different letters are statistically different (P < 0.05).