TABLE 2.
Membrane lipid 16:0/18:1ω7c ratio of various E. coli strainsb
| Heat treatment | Ratio for straina: |
|||
|---|---|---|---|---|
| HEC | HEC-RM | NPEC | HEC-VM | |
| Control | 15.1 A | 12.6 A | 5.5 D | 5.2 B |
| 42°C HS | 14.4 A | 13.0 A | 8.4 C | 4.9 C |
| 45°C HS | 14.7 A | 12.5 A | 5.5 D | 5.3 B |
| 42°C HA | 11.4 B | 9.0 B | 13.7 B | 6.0 A |
| 45°C HA | 7.2 C | 6.0 C | 56.5 A | 5.3 B |
a
Values in the same column followed by different letters are significantly different (P < 0.05; n = 6).
b
E. coli O157:H7 (HEC), E. coli O157:H7 rpoS mutant (HEC-RM), NPEC, and E. coli O157:H7 verotoxin mutant (HEC-VM).