TABLE 4.
Survival of L. monocytogenes, E. coli, and Salmonella serovar Enteritidis during 3 months of incubation at 25°C after inoculation into organic waste at various stages of composting
| Composting time (wk) | Last detection daya
|
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
L. monocytogenes
|
E. coli
|
Salmonella serovar Enteritidis
|
||||||||||
| Reactor Ab | Reactor B | Reactor C | Reactor D | Reactor A | Reactor B | Reactor C | Reactor D | Reactor A | Reactor B | Reactor C | Reactor D | |
| 1 | NDc | ND | 60 | ND | ND | 3 | ND | ND | 3 | 3 | 8 | 3 |
| 2 | ND | ND | 60 | ND | ND | 30 | ND | 8 | 8 | 60 | 30 | 8 |
| 4 | ND | ND | 90 | ND | 90 | 60 | 90 | 90 | 60 | 8 | 8 | 30 |
| 8 | ND | ND | ND | ND | ND | 8 | ND | ND | 90 | 90 | 90 | 90 |
| 12 (mature) | ND | ND | ND | ND | ND | 8 | 8 | 3 | 90 | 8 | 90 | 90 |
a
Last sampling time with positive selective enrichment (3, 8, 30, 60, or 90 days). The limit of detection was 1 CFU g (dry weight)−1.
b
For reactor contents see Table 2, footnote a.
c
ND, not detected after broth enrichment.