Table 2.
Environmental findings from the workplace of Case B, plant B and mill B
| Date (before or after infection) |
Water systems sampled (sample type) |
Temperature (°C) |
Legionella concentration (cfu/l) |
Type of Legionella |
|---|---|---|---|---|
|
16th Aug 2005 (before) |
Active sludge basin at the waste water treatment plant B (water) |
37.7 | 3.0 × 107 | L. pneumophila serogroup 5 |
|
15th Nov 2006 (after) |
Active sludge basin at the waste water treatment plant B (water) |
35.2 | 4.3 × 107 and 8.0 × 109 |
L. pneumophila serogroup 5 and L. rubrilucens |
|
15th Nov 2006 (after) |
Cooling tower at the waste water treatment plant B (water) | 37.3 | 1.7 × 103 | L. pneumophila serogroup 2 |
|
15th Nov 2006 (after) |
Well of rejected waste water at plant B (water) | 31.0 | 3.2 × 107 and 2.0 × 108 |
L. pneumophila serogroup 5 and L. rubrilucens |
|
15th Nov 2006 (after) |
Process water, paper machine X, mill B (water) | 50.0 | Not detected | |
|
15th Nov 2006 (after) |
Process water, paper machines X and Y, mill B (water) | 35.1 | Not detected | |
|
15th Nov 2006 (after) |
Shower water system in mill B, used by Case B (water) | 35.0 | Not detected | |