Table 4.
Number of Legionella spp. colonies (CFU/L) appearing on different plates: BCYEα positive results vs. MWY negative results.
| Oxoid | Xebios | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Samples | BCYEα | MWY | L. spp. | B. Flora on BCYEα |
B. Flora on MWY |
Samples | BCYEα | MWY | L. spp. | B. Flora on BCYEα |
B. Flora on MWY |
| 1 | 50 | 0 | Lp3 | 1+ | 0 | 1 | 50 | 0 | Lp3 | 0 | / |
| 2 | 50 | 0 | Lp1 | 1+ | 0 | 2 | 500 | 0 | Lp1 | 1+ | / |
| 3 | 150 | 0 | Lp6 | 1+ | 0 | ||||||
| 4 | 200 | 0 | L.spp | 0 | 0 | ||||||
| 5 | 400 | 0 | L.spp | 0 | 0 | ||||||
| 6 | 600 | 0 | L.spp | 1+ | 0 | ||||||
| 7 | 1050 | 0 | L.spp | 0 | 0 | ||||||
| 8 | 2200 | 0 | L.spp | 2+ | 0 | ||||||
| 9 | 2350 | 0 | L.spp | 0 | 0 | ||||||
| 10 | 3400 | 0 | L.spp | 0 | 0 | ||||||
Background (B.) flora was measured by semiquantitative counting: four categories were determined according to the visual density of colonies spread onto the plate, where zero is no background flora and 3+ is massive contamination (see supplementary materials). Lp 1 = L. pneumophila serogroups 1; Lp 3 = L. pneumophila serogroups 3; Lp 6 = L. pneumophila serogroups 6; L.spp. = Legionella spp. non-pneumophila.