Table 8.
Detection of SARS-CoV-2 B1 and Gamma strains over time from different sites.
| Virus | Site | No. Positive/No. Tested (%) | ||||
|---|---|---|---|---|---|---|
| Week 1 | Week 2 | Week 3 | Week 4 | Week 5 | ||
| B1 | nasal | 36/49 (73.5) | 20/48 (41.7) | 16/50 (32.0) | 9/48 (18.8) | 7/43 (16.3) b |
| Gamma | 35/46 (76.1) | 26/47 (55.3) | 17/45 (37.8) | 9/38 (23.7) | 12/37 (32.4) b | |
| B1 | saliva | 8/38 (21.1) a | 2/43 (4.7) | 0/49 | 3/45 (6.7) | 1/39 (2.6) c |
| Gamma | 2/44 (4.5) | 1/41 (2.4) | 1/35 (2.9) | 1/41 (2.4) | 1/32 (3.1) | |
| B1 | urine | 0/45 | 0/51 | 0/48 | NT | NT |
| Gamma | 0/43 | 1/46 (2.2) | 0/41 | NT | NT | |
| B1 | anal | 1/51 (2.0) | 1/34 (2.9) | 0/37 | NT | NT |
| Gamma | 5/39 (12.8) | 2/42 (4.8) | 0/40 d | NT | NT | |
| B1 | blood | 1/51 (2.0) | 0/17 | 0/1 | NT | NT |
| Gamma | 5/43 (11.6) | 5/45 (11.1) | 4/44 (9.1) | NT | NT | |
a p = 0.0390 vs. Gamma; b p < 0.0001 vs. week 1; c p = 0.0148 vs. week 1; d p = 0.0255 vs. week 1 NT, not tested.