Table 1.
Presumptive Sources of Infection and Symptomatic Status of PCR-Confirmed Cases
| Patients | Health Care Workers | ||||
|---|---|---|---|---|---|
| Community-Acquired Infection | Nosocomial Infection | Community-Acquired Infection | Nosocomial Infection | ||
| (n = 19) | (n = 5) | (n = 9) | (n = 40) | ||
| Sex, No. (%) | Male | 12 (63.1) | 5 (100) | 3 (33.3) | 21 (52.5) |
| Female | 7 (36.8) | 0 (0) | 6 (66.7) | 19 (47.5) | |
| Age, mean ± SD, y | 56.9 ± 21.0 | 74.0 ± 9.2 | 31.4 ± 4.0 | 31.7 ± 10.1 | |
| 0–19 y, No. (%) | 1 (5.3) | 0 (0) | 0 (0.0) | 0 (0) | |
| 20–39 y, No. (%) | 2 (10.5) | 0 (0) | 9 (100) | 35 (87.5) | |
| 40–59 y, No. (%) | 5 (26.3) | 0 (0) | 0 (0.0) | 3 (7.5) | |
| ≥60 y, No. (%) | 11 (57.9) | 5 (100) | 0 (0.0) | 2 (5.0) | |
| Presumptive sources of infection in the hospital and their symptomatic status, No. (%) | |||||
| From a patient | - | 4 (80.0) | - | 9 (22.5) | |
| Asymptomatic | - | 4 (100) | - | 7 (77.8) | |
| Presymptomatic | 4 (100) | 7 (100) | |||
| Never-symptomatic | 0 (0) | 0 (0) | |||
| Symptomatic | - | 0 (0) | - | 2 (22.2) | |
| From a worker | - | 0 (0) | - | 31 (77.5) | |
| Asymptomatic | - | 0 (0) | - | 31 (100) | |
| Presymptomatic | - | 10 (32.2) | |||
| Never-symptomatic | - | 2 (6.5) | |||
| Unable to distinguisha | - | 19 (61.3) | |||
| Symptomatic | - | 0 (0) | - | 0 (0) | |
| Unknown | - | 1 (20.0) | - | 0 (0) | |
| Symptom status at PCR testing, No. (%) | |||||
| Symptomatic | 11 (57.9) | 4 (87.5) | 4 (44.4) | 16 (40.0) | |
| Presymptomatic | 0 (0.0) | 1 (12.5) | 0 (0.0) | 4 (10.0) | |
| Asymptomatic | 8 (42.1) | 0 (0) | 5 (55.6) | 20 (50.0) | |
Abbreviation: PCR, polymerase chain reaction.
aResident physicians were not able to distinguish the source of the infection because of the group infection.