TABLE 5.
Results for water to surface transfer
| Organism | Microbe count (mean log10 CFU or PFU) in/on:
|
% Transfer efficiency (95% confidence interval)a | |
|---|---|---|---|
| Washing machine tub water | 20-cm2 surface | ||
| E. coli | 4.53 | <1 | <0.003 |
| MS-2 | 7.94 | −0.33 | 0.0000005 (0.00000015-0.000002) |
| PRD-1 | 7.75 | −0.52 | 0.0000004 (0.0000001-0.0000017) |
a
Percent transfer efficiency to environmental surfaces from water is calculated as follows: (number of microorganisms recovered from a swabbed area of a 20-cm2 environmental surface/number of microorganisms in the tub water) × 100.