TABLE 1.
Recovery of E. coli O157:H7 from ground beef, peptone, and watera
| Comparison | Mean recovery ratiob ± SEM (no. of samples)
|
||
|---|---|---|---|
| Ground beef | Peptone | Water | |
| CTC+, FITC+ cellsc on beads vs CTC+, FITC+ cells in inoculum | 4.89 ± 3.09 (9) | 1.24 ± 0.22 (8) | 7.12 ± 4.50 (11) |
| FITC+ cellsd on beads vs FITC+ cells in inoculum | 4.51 ± 2.34 (10) | 0.84 ± 0.20 (11) | 0.90 ± 0.11 (17) |
| CTC+, FITC+ cells on beads vs PCe of inoculum | 6.04 ± 3.15 (13) | 3.03 ± 0.70 (11) | 2.39 ± 0.70 (10) |
| PC of cells on beads vs PC of inoculum | 1.63 ± 0.29 (23) | 1.26 ± 0.45 (13) | 0.42 ± 0.06 (15) |
| CTC+, FITC+ cells on beads vs PC of cells on beads | 3.79 ± 0.64 (13) | 5.89 ± 3.42 (9) | 12.41 ± 6.13 (9) |
a
Samples were inoculated with 100 to 106 target bacteria per ml.
b
E. coli O157:H7 recovered by IMS versus number in inoculum or on beads.
c
Respiring, FAb-positive E. coli O157:H7.
d
FAb-positive E. coli O157:H7.
e
PC, plate count on SMAC agar.