TABLE 4.
Sampling results for two UVA dorm complexes over time
| Complex | Sample daya | CT values (N1, N2, RP)b | Determination | Interpretationc | No. of wkly casesd |
|---|---|---|---|---|---|
| A | 8 | 34.7, 38.0, 30.6 | Positive | True positive | 103 N, 2 NP [both day 8 after positive], 2 I, 0 C |
| 8 (duplicate) | 32.6, 35.6, 31.3 | Positive | True positive | ||
| 14 | 37.3, 39.3, 30.4 | Positive | True positive | 102 N, 1 NP [day 5 after new clinical positive], 1 I, 2 C | |
| 14, cleanout valve R | ND, ND, 32.5 | Negative | True negative | ∼20 N, 0 NP, 0 I, 0 C | |
| 14, cleanout valve R (duplicate) | ND, ND, 34.8 | Negative | True negative | ||
| 21 | 33.4, 35.3, 35.3 | Positive | Positive, conv. only | 102 N, 0 NP, 0 I, 3 C | |
| 23, cleanout valve A | ND, ND, 31.9 | Negative | Positive, conv. only | ∼15 N, 0 NP, 0 I, 1 C (WW tested 16 days after single clinical positive) | |
| 31 (same day) | 35.3, 35.7, 30.3 | Positive | Positive, conv. only | 102 N, 0 NP, 0 I, 3C | |
| 31 (next day) | ND, 36.9, 31.3 | Indeterminate | |||
| 32 | ND, 36.5, 29.1 | Indeterminate | |||
| 32 (duplicate) | 36.2, 37.6, 29.8 | Positive | Positive, conv. only | ||
| 36 | 38.1, 38.9, 33.4 | Positive | Positive, conv. only | 102 N, 0 NP, 0 I, 3C | |
| 36 (duplicate) | 37.3, 40.5, 33.2 | Positive | Positive, conv. only | ||
| 42 | 34.7, 35.1, 30.5 | Positive | Positive, conv. only | 102 N, 0 NP, 0 I, 3C | |
| 42 (duplicate) | 35.5, 36.4, 31.2 | Positive | Positive, conv. only | ||
| 45 | 34.4, 35.2, 31.1 | Positive | Positive, conv. only | ||
| 45 (duplicate) | 35.4, 35.8, 31.1 | Positive | Positive, conv. only | ||
| 50 | 37.6, 41.5, 33.1 | Positive | Positive, conv. only | 102 N, 0 NP, 0 I, 3C | |
| 50 (duplicate) | 37.2, 39.5, 35.4 | Positive | Positive, conv. only | ||
| 51 | 36.0, 37.4, 30.5 | Positive | Unknown | Unknowne | |
| 52 | ND, ND, 37.1 | Negative | Unknown | Unknowne | |
| 57 | ND, 40.5, 32.5 | Indeterminate | Unknown | Unknowne | |
| B | 37 | ND, ND, 32.2 | Negative | True negative | 66 N, 0 NP, 0 I, 0 C |
| 37 (duplicate) | ND, ND, 31.2 | Negative | True negative | ||
| 38 | ND, ND, 32.1 | Negative | True negative | 66 N, 0 NP, 0 I, 0 C | |
| 38 (duplicate) | ND, ND, 32.0 | Negative | True negative | ||
| 45 | ND, ND, 30.9 | Negative | True negative | 66 N, 0 NP, 0 I, 0 C | |
| 45 (duplicate) | ND, ND, 31.2 | Negative | True negative | ||
| 57 | ND, ND, 30.1 | Negative | Unknown | Unknowne | |
End of the overnight sample collection period, which was also the day samples were processed. Numbering refers to time since the start of the study, aligning with Table 3. Unless otherwise noted, samples were collected from the manhole locations identified in Fig. 1.
Lower CT values indicate higher detected concentrations. ND, not detected (CT ≥ 45).
conv., convalescent.
N, negative; NP, newly positive case identified via positive clinical result (clinical testing dates are in brackets); I, infectious cases corresponding to individuals within 1 to 14 days of their positive clinical result (including NP cases); C, convalescent cases, corresponding to occupants who were >15 days beyond a positive test result. All positive individuals self-isolated within the catchment area for the duration of their illness.
New- and convalescent-case counts are unknown for the occupant changeover period.