TABLE 2.
Aerobic plate counts for drain samples collected before, during, and after CE treatment
| Time | Location | Aerobic plate count (log10 CFU/100 cm2) for drains |
||||
|---|---|---|---|---|---|---|
| Drain 1 | Drain 3 | Drain 4 | Drain 6 | Drain 8 | ||
| Before CE treatmenta | Bottom side of cover | 8.4 ± 1.0 | 8.3 ± 0.6 | 8.7 ± 1.0 | 9.1 ± 0.6 | 10.0 ± 0.8 |
| Right side of drain | 8.5 ± 0.5 | 8.6 ± 0.6 | 8.6 ± 0.3 | 9.3 ± 0.6 | 9.6 ± 0.4 | |
| Left side of drain | 8.7 ± 0.3 | 8.5 ± 0.6 | 8.3 ± 0.7 | 9.1 ± 0.2 | 9.6 ± 1.0 | |
| Inside of drain | 8.7 ± 0.8 | 9.4 ± 0.3 | 8.8 ± 0.6 | 8.4 ± 0.4 | 9.9 ± 0.4 | |
| Floor within ca. 30 cm of drain | 8.4 ± 0.7 | 9.0 ± 0.8 | 8.1 ± 1.2 | 9.5 ± 0.6 | 9.0 ± 0.7 | |
| During CE treatmentb | Bottom side of cover | 8.4 ± 0.9e | 7.3 ± 0.7d | 9.1 ± 0.6e | 9.9 ± 0.6e | 9.3 ± 0.4e |
| Right side of drain | 8.4 ± 1.4e | 8.0 ± 0.6e | 8.8 ± 0.9e | 9.5 ± 0.8e | 8.8 ± 0.5d | |
| Left side of drain | 8.0 ± 0.7e | 7.4 ± 0.7d | 8.5 ± 1.5e | 9.4 ± 0.8e | 9.1 ± 0.5e | |
| Inside of drain | 8.1 ± 0.8e | 7.4 ± 0.8d | 8.6 ± 0.7e | 9.0 ± 1.2e | 9.0 ± 0.9e | |
| Floor within ca. 30 cm of drain | 7.8 ± 0.3e | 8.1 ± 0.6d | 9.2 ± 0.5e | 9.2 ± 0.7e | 8.5 ± 0.4e | |
| After CE treatmentc | Bottom side of cover | 8.8 ± 1.1e | 8.0 ± 0.9e | 9.6 ± 0.5e | 8.2 ± 0.4d | 9.6 ± 1.3e |
| Right side of drain | 8.3 ± 1.3e | 8.5 ± 1.3e | 7.1 ± 0.3d | 8.7 ± 0.9e | 9.2 ± 1.4e | |
| Left side of drain | 8.9 ± 1.4e | 8.3 ± 1.6e | 6.7 ± 0.4d | 7.9 ± 0.9d | 8.2 ± 1.3d | |
| Inside of drain | 8.7 ± 1.5e | 8.2 ± 1.0d | 7.6 ± 0.5d | 8.4 ± 0.8e | 9.8 ± 0.7e | |
| Floor within ca. 30 cm of drain | 8.3 ± 1.3e | 9.0 ± 0.8e | 7.7 ± 0.2e | 8.4 ± 1.2d | 9.0 ± 1.6e | |
Each drain was sampled in four locations and assayed for APCs every 2 weeks for 10 weeks before CE treatment. The values are the means ± standard deviations for six samplings.
Each drain was sampled in four locations and assayed for APCs every week for 4 weeks during CE treatment. The values are the means ± standard deviations for four samplings.
Each drain was sampled in four locations and assayed for APCs six times at 2- to 4-week intervals for up to 19 weeks after the last CE treatment was applied. The values are the means ± standard deviations for six samplings.
The APCs were significantly different (P < 0.05) from the APCs before CE treatment.
The APCs were not significantly different (P > 0.05) from the APCs before CE treatment.