Volume 26, Number 10—October 2020
Dispatch
High Proportion of Asymptomatic SARS-CoV-2 Infections in 9 Long-Term Care Facilities, Pasadena, California, USA, April 2020
and Ying-Ying Goh
Table 2
Results from facilitywide testing by facility and association to the facility, Pasadena, California, USA, April 2020*
| Category | Total eligible, no. | Persons tested, no. (%) | Confirmed COVID-19, no. (%) | Asymptomatic infection, no. (%) |
|---|---|---|---|---|
| Total | 1,092 | 938 (85.9) | 631 (67.3) | 257 (40.7) |
| Staff | 485 | 356 (73.6) | 223 (62.6) | 55 (24.7) |
| Residents |
608 |
582 (95.7) |
408 (70.1) |
202 (49.5) |
| Facility A | 196 | 174 (88.8) | 123 (70.7) | 79 (64.2) |
| Staff | 109 | 88 (80.7) | 46 (52.3) | 13 (28.3) |
| Residents |
87 |
86 (98.9) |
77 (89.5) |
66 (85.7) |
| Facility B | 87 | 86 (98.9) | 69 (80.2) | 27 (39.1) |
| Staff | 35 | 34 (97.1) | 23 (67.6) | 4 (17.4) |
| Residents |
52 |
52 (100) |
46 (88.5) |
23 (50.0) |
| Facility C | 112 | 109 (97.3) | 90 (82.3) | 34 (37.8) |
| Staff | 35 | 35 (100) | 25 (71.4) | 6 (24.0) |
| Residents |
77 |
74 (96.1) |
65 (87.8) |
28 (43.1) |
| Facility D | 134 | 122 (91.0) | 88 (72.1) | 35 (39.8) |
| Staff | 33 | 26 (78.8) | 26 (100) | 6 (23.1) |
| Residents |
101 |
96 (95.0) |
62 (64.6) |
29 (46.8) |
| Facility E | 98 | 71 (72.4) | 18 (25.4) | 9 (50.0) |
| Staff | 62 | 35 (56.5) | 7 (20.0) | 2 (28.6) |
| Residents |
36 |
36 (100) |
11 (30.6) |
7 (63.6) |
| Facility F | 79 | 78 (98.7) | 67 (85.9) | 14 (20.9) |
| Staff | 25 | 25 (100) | 25 (100) | 6 (24.0) |
| Residents |
54 |
53 (98.1) |
42 (79.2) |
8 (19.0) |
| Facility G | 117 | 110 (94.0) | 76 (69.1) | 26 (34.2) |
| Staff | 21 | 16 (76.2) | 16 (100) | 3 (18.8) |
| Residents |
96 |
94 (97.9) |
60 (63.8) |
23 (38.3) |
| Facility H | 212 | 148 (69.8) | 63 (42.6) | 20 (31.7) |
| Staff | 142 | 87 (61.3) | 36 (41.4) | 11 (30.6) |
| Residents |
70 |
61 (87.1) |
27 (44.3) |
9 (33.3) |
| Facility I | 57 | 50 (87.7) | 37 (74.0) | 13 (35.1) |
| Staff | 22 | 20 (90.9) | 19 (95.0) | 4 (21.1) |
| Residents | 35 | 30 (85.7) | 18 (60.0) | 9 (50.0) |
*Results include the percentage of staff and residents who had a severe acute respiratory syndrome coronavirus 2 reverse transcription PCR test result (positive or negative). A positive result was taken as confirmation of COVID-19 infection. Asymptomatic infection was defined as a confirmed COVID-19 infection with no reported typical or atypical symptoms. Percentage of population with test results is equal to the number of persons with test results divided by the number eligible staff/residents in the facility. Percentage of confirmed COVID-19 is equal to the number of persons with a positive test result divided by the number of persons with test results. COVID-19, coronavirus disease.