TABLE 1.
Log cell numbers of E. coli O157:H7 ATCC 35150, ATCC 43889, and ATCC 43895 cultured under LSMMG and NG conditions for 6 and 24 h in LB medium or M9 minimal medium containing 0.4% glucose
| Medium | Time (h) | Log CFU/mla |
|||||
|---|---|---|---|---|---|---|---|
|
E. coli O157:H7 ATCC 35150 |
E. coli O157:H7 ATCC 43889 |
E. coli O157:H7 ATCC 43895 |
|||||
| LSMMG | NG | LSMMG | NG | LSMMG | NG | ||
| LB | 0 | 6.87 ± 0.11 A | 6.87 ± 0.11 A | 6.43 ± 0.14 A | 6.43 ± 0.14 A | 6.93 ± 0.24 A | 6.93 ± 0.24 A |
| 6 | 9.51 ± 0.14 B | 9.27 ± 0.07 B | 9.34 ± 0.10 B | 9.19 ± 0.05 B | 9.29 ± 0.08 B | 9.18 ± 0.07 B | |
| 24 | 9.78 ± 0.06 B | 9.76 ± 0.11 C | 9.93 ± 0.31 B | 9.65 ± 0.33 B | 10.00 ± 0.12 C | 9.90 ± 0.15 C | |
| M9 and 0.4% glucose | 0 | 5.62 ± 0.30 A | 5.62 ± 0.30 A | 5.64 ± 0.23 A | 5.64 ± 0.23 A | 5.69 ± 0.27 A | 5.69 ± 0.27 A |
| 6 | 8.76 ± 0.05 B | 8.72 ± 0.05 B | 8.76 ± 0.04 B | 8.65 ± 0.07 B | 8.57 ± 0.10 B | 8.47 ± 0.11 B | |
| 24 | 9.09 ± 0.04 BD | 8.78 ± 0.07 BE | 9.12 ± 0.04 CD | 8.95 ± 0.07 BE | 9.13 ± 0.02 CD | 8.89 ± 0.04 CE | |
a
Means ± SE; n = 6 samples for each gravity condition. A to C, values in the same column for each medium are significantly different (P < 0.05); D and E, values in the same row for each strain are significantly different (P < 0.05).