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 |
|---|---|---|---|---|
28 th Feb 2006 (before) | Active sludge basin at the waste water treatment plant (water) | 33.0 | 2.0 × 107 | L. pneumophila serogroup 13 |
28 th Feb 2006 (before) | Circulating waste water at the waste water treatment plant (water) | 35.0 | 1.0 × 104 | L. pneumophila serogroup 3 |
29 th Aug 2006 (after) | Active sludge basin at the waste water treatment plant (water) | 36.0 | 1.0 × 106 | L. pneumophila serogroup 1 |
29 th Aug 2006 (after) | Post-clarification basin at the waste water treatment plant (water) | 35.0 | 2.3 × 104 | L. pneumophila serogroup 1, subgroup Bellingham |
29 th 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 |