Table 1 Results of the microbiological analysis performed on the water samples collected
From: Legionella on board trains: effectiveness of environmental surveillance and decontamination
Pre-decontamination period | Post-decontamination period | Total | |
|---|---|---|---|
Number of water samples analysed | 679 (54.538% of total samples analyzed) | 566 (45.462% of total samples analyzed) | 1245 |
Number of samples positive for Legionella spp. | 394 (58.027%) | 242 (42.756%) | 636 |
Number of samples positive for L. pneumophila 1 | 220 (55.838%) | 177 (73.140%) | 397 |
Number of samples positive for L. pneumophila 2 -14 | 75 (19.036%) | 39 (16.116%) | 114 |
Number of samples positive for L. pneumophila 1 and 2 -14 | 99 (25.127%) | 23 (9.504%) | 122 |
Number of samples positive for Legionella other species | 0 (0.000%) | 3 (1.240%) | 3 |
Number of samples with load values < 100 CFU/L | 69 (17.513%) | 14 (5.785%) | 83 |
Number of samples with load values 100–999 CFU/L | 155 (39.340%) | 121 (50.000%) | 276 |
Number of samples with load values 1,000-9,999 CFU/L | 138 (35.025%) | 85 (35.124%) | 223 |
Number of samples with load values ≥ 10,000 CFU/L | 32 (8.122%) | 22 (9.091%) | 54 |