| No. (%) Legionella Isolates | No. (%) of L.pneumophila isolates | |||||
| Samples Source | Total | L. pneumophlia | Non-L. pneumophlia | Total | sg1 | Non-sg1 |
| Cooling tower water | 197 | 190 (96.4%) | 7 (3.6%) | 190 | 51 (27%) | 139 (73%) |
| Hot water | 74 | 70 (94.6%) | 4 (5.4%) | 70 | 18 (25.7%) | 53 (75%) |
| Total | 271 | 260 (96.3%) | 11 (4.2%) | 260 | 69 (26.5%) | 192 (73.6%) |