Table 1.
Environmental findings from the workplace of Case A, plant A
| Date (before or after infection) |
Water systems sampled (sample type) |
Temperature (°C) |
Legionella concentration (cfu/l) |
Type of Legionella |
|---|---|---|---|---|
|
28th Feb 2006 (before) |
Active sludge basin at the waste water treatment plant (water) |
33.0 | 2.0 × 107 | L. pneumophila serogroup 13 |
|
28th Feb 2006 (before) |
Circulating waste water at the waste water treatment plant (water) | 35.0 | 1.0 × 104 | L. pneumophila serogroup 3 |
|
29th Aug 2006 (after) |
Active sludge basin at the waste water treatment plant (water) |
36.0 | 1.0 × 106 | L. pneumophila serogroup 1 |
|
29th Aug 2006 (after) |
Post-clarification basin at the waste water treatment plant (water) | 35.0 | 2.3 × 104 | L. pneumophila serogroup 1, subgroup Bellingham |
|
29th Aug 2006 (after) |
Post-clarification basin at the waste water treatment plant (sludge) | 36.0 | 2.0 × 106 and 1.0 × 106 |
L. pneumophila serogroup 1, subgroup Bellingham and L. pneumophila serogroup 13 |