Table 1.
Opportunistic microbial contamination based on frequency of detection (FOD: %), geometric mean concentration (MeC: cell equivalent or CE L−1) and maximum concentration (MaC: CE L−1) analyzed using qPCR from bathroom water (n=13) from 2012 (Mar 28-Apr. 24 and Oct. 24 – Dec. 27) to 2013 (Jan. 30 – Apr. 23, Jun. 5 – Jul. 25 and Dec. 18)
| Site | 1st draw cold tap | 2nd draw cold tap | 1st draw hot tap | 2nddraw hot tap | shower |
|---|---|---|---|---|---|
| Legionella FOD (%) | 37 | 95 | 46 | 38 | 77 |
| Legionella MeC (StDev) (CE/L) | 3(3) | 42(10) | 4(8) | 4(9) | 204 (14) |
| Legionella MaC (CE/L) | 13 | 6262 | 34 | 30 | 1642 |
| Acanthamoeba FOD (%) | 4 | 4 | 4 | 4 | 8 |
| Acanthamoeba MeC (StDev) (CE/L) | 1(4) | 1(2) | 1(5) | 1(3) | 1(6) |
| Acanthamoeba MaC (CE/L) | 225 | 21 | 46 | 10 | 150 |
| Vermamoeba vermiformis FOD (%) | 87 | 95 | 87 | 87 | 100 |
| Vermamoeba vermiformis MeC (StDev) (CE/L) | 49(10) | 90(6) | 1601 (72) | 407 (32) | 242 (13) |
| Vermamoeba vermiformis MaC (CE/L) | 732 | 1135 | 4872 | 836 | 648 |
| Mycobacterium FOD (%) | 100 | 100 | 100 | 100 | 100 |
| Mycobacterium MeC (StDev) (CE/L) | 6.4×104(3) | 2.3×104 (2) | 2.1×106(3) | 4.6×105 (3) | 8.6×lO4 (3) |
| Mycobacterium MaC (CE/L) | 2.8×105 | 1.4×105 | 2.2×106 | 2.6×105 | 7.2×104 |
| Pseudomonas aeruginosa FOD (%) | 0 | 37 | 12 | 8 | 12 |
| Pseudomonas aeruginosa MeC (StDev) (CE/L) | 0 | 8(10) | 6(38) | 3(20) | 7(23) |
| Pseudomonas aeruginosa MaC (CE/L) | 0 | 878 | 1176 | 878 | 1021 |
| # of instances Rank 1 FOD | 1 | 2 | |||
| # of instances Rank 1 MeC | 1 | 1 | 2 | ||
| # of instances Rank 1 MaC | 1 | 1 | 2 | 1 |