Table 2.
Detection of SARS-CoV-2 RNA in water samples.
| Sample type (no. of tested samples) | SARS-CoV-2 |
N501Y variant |
||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| CDC-N1 |
CDC-N2 |
NIID_2019-nCOV_N |
N_Sarbeco |
Total |
||||||||
| No. of positives (%) | Conc. (log10 GC/L)a | No. of positives (%) | Conc. (log10 GC/L)a | No. of positives (%) | Conc. (log10 GC/L)a | No. of positives (%) | Conc. (log10 GC/L)a | No. of positives (%) | No. of positives (%) | Conc. (log10 GC/L)a | ||
| WWTP A | Influent (20) | 7 (35) | 5.0 ± 0.2 | 11 (55) | 5.1 ± 0.4 | 3 (15) | 5.1 ± 0.2 | 8 (40) | 4.8 ± 0.7 | 12 (60) | 1 (5) | 2.3 |
| Effluent (20) | 5 (25) | 5.2 ± 0.7 | 7 (35) | 5.3 ± 0.5 | 4 (20) | 5.3 ± 0.6 | 4 (20) | 5.5 ± 1.0 | 8 (40) | 0 (0) | ND | |
| WWTP B | Influent (14) | 4 (29) | 5.4 ± 1.1 | 8 (57) | 5.1 ± 0.9 | 5 (36) | 5.3 ± 1.0 | 5 (36) | 5.3 ± 1.0 | 10 (71) | 0 (0) | ND |
| Effluent (14) | 6 (43) | 5.3 ± 0.8 | 8 (57) | 5.0 ± 0.9 | 6 (43) | 5.3 ± 0.8 | 6 (43) | 5.4 ± 0.8 | 8 (57) | 0 (0) | ND | |
| River water (13) | 5 (38) | 5.0 ± 0.6 | 7 (47) | 4.0 ± 1.2 | 4 (31) | 5.1 ± 0.6 | 6 (46) | 5.0 ± 0.4 | 9 (69) | 0 (0) | ND | |
| Hospital wastewater (1) | 0 (0) | NDb | 1 (100) | 2.6 | 0 (0) | NDb | 0 (0) | ND | 1 (100) | 0 (0) | ND | |
| Sewer lines (2) | 2 (100) | 4.9 ± 0.1 | 2 (100) | 3.9 ± 0.3 | 1 (50) | 4.8 | 1 (50) | 4.9 | 2 (100) | 0 (0) | ND | |
a
Mean ± standard deviation.
b
ND, not detected.