| Variable | Dialysis Units (n = 30) | Normal reference | ||||
| Unit 1 | Unit 2 | Unit 3 | Unit 4 | Unit 5 | ||
| Colonies counted × 100 ml | Absent | Absent | Absent | Absent | Absent | Absent |
| Coliform colonies counted × 100 ml | Absent | Absent | Absent | Absent | Absent | Absent |
| Bacteria counted × 1 ml at 35˚ | 7 | 4 | 4 | 4 | 5 | ≤50 cell/ml |
| Bacteria counted × 1 ml at 22˚ | 9 | 7 | 10 | 10 | 10 | ≤50 cell/ml |
| Pseudomonas | Absent | Absent | Absent | Absent | Absent | Absent |
| Strepto | Absent | Absent | Absent | Absent | Absent | Absent |
| Anaerobe | Negative | Negative | Negative | Negative | Negative | Negative |