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Numbers and percentages of species and serogroups of Legionella according to treatment (χ2 = 270.042; P < 0.001)
| Treatment | No. (%) of positive samples |
||
|---|---|---|---|
| L. pneumophila serogroup 1 alone or with others | L. pneumophila serogroups 2–14 | Legionella spp. | |
| Monochloramine | 7 (77.8) | 0 (0.0) | 2 (22.2) |
| Chlorine dioxide | 51 (85.0) | 4 (6.7) | 5 (8.3) |
| Hydrogen peroxide | 21 (26.3) | 5 (6.2) | 54 (67.5) |
| Hyperthermia | 0 (0.0) | 36 (100.0) | 0 (0.0) |
