TABLE 2.
Comparison of viable counts from the DUWS biofilm samples
| Sample | Viable count (CFU · cm−2) from biofilm samples taken from:
|
n | |||||
|---|---|---|---|---|---|---|---|
| Water lines
|
Air lines
|
||||||
| Geometric mean | Minimum | Maximum | Geometric mean | Minimum | Maximum | ||
| Water source | |||||||
| Soft | 892 | 2 | 42,000 | 33 | 0 | 30,000 | 10 |
| Hard | 1,103 | 0 | 64,000 | 85 | 0 | 3,200 | 27 |
| Deionized | 411 | 5 | 500 | 10 | 0 | 1,600 | 8 |
| Distilled | 2,200 | 1,100 | 4,400 | 259 | 12 | 5,600 | 2 |
| Supply type | |||||||
| Tank fed | 1,268 | 40 | 8,800 | 33 | 0 | 2,000 | 3 |
| Bottle fed | 717 | 2 | 42,000 | 26 | 0 | 30,000 | 29 |
| Main fed | 1,383 | 0 | 64,000 | 199 | 0 | 30,000 | 15 |
| Total | 917 | 0 | 64,000 | 51 | 0 | 30,000 | 47 |