Table 1.
RTE fresh produce | Corresponding initial inoculum (CFU/g) | LAMP-SALM (day 0) | LAMP-SALM (day 1) | LAMP-SALM (day 2) |
---|---|---|---|---|
Romaine lettuce | 3*10^0 | - | + | + |
3*10^1 | - | + | + | |
3*10^2 | - | + | + | |
3*10^3 | - | + | + | |
3*10^4 | + | + | + | |
3*10^5 | + | + | + | |
3*10^6 | + | + | + | |
3*10^7 | + | + | + | |
3*10^8 | + | + | + | |
Strawberries | ||||
1*10^0 | - | + | + | |
1*10^1 | - | + | + | |
1*10^2 | - | + | + | |
1*10^3 | - | + | + | |
1*10^4 | - | + | + | |
1*10^5 | - | + | + | |
1*10^6 | - | + | + | |
1*10^7 | + | + | + | |
1*10^8 | + | + | + | |
Cherry tomatoes | ||||
2*10^0 | - | + | + | |
2*10^1 | - | + | + | |
2*10^2 | - | + | + | |
2*10^3 | - | + | + | |
2*10^4 | - | + | + | |
2*10^5 | + | + | + | |
2*10^6 | + | + | + | |
2*10^7 | + | + | + | |
2*10^8 | + | + | + | |
Green onions | ||||
2*10^0 | - | + | + | |
2*10^1 | - | + | + | |
2*10^2 | - | + | + | |
2 *10^3 | - | + | + | |
2*10^4 | + | + | + | |
2*10^5 | + | + | + | |
2*10^6 | + | + | + | |
2*10^7 | + | + | + | |
2*10^8 | + | + | + | |
Sour berries | 3*10^0 | - | + | + |
3*10^1 | - | + | + | |
3*10^2 | - | + | + | |
3*10^3 | - | + | + | |
3*10^4 | - | + | + | |
3*10^5 | + | + | + | |
3*10^6 | + | + | + | |
3*10^7 | + | + | + | |
3*10^8 | + | + | + |
RTE, ready to eat; CFU, colony-forming units; LAMP, loop-mediated isothermal amplifications; SALM, Salmonella. Day 0, fresh produce sample with PBW without enrichment; day 1, fresh produce sample in YPCE enriched at 37°C for 24h; day 2, fresh produce sample in YPCE enriched at 37°C for 48h.