Demographic characteristics of primary and secondary outbreak cases
| Variable | No. (%)* |
|---|---|
| Primary cases (n = 58) | |
| Age, yr, mean (range) | |
| Overall | 62 (19–97) |
| Patients | 79 (24–97) |
| Visitors | 75 (71–78) |
| Staff | 41 (19–62) |
| Case classification | |
| Patient | 31 (54) |
| Visitor | 2 (3) |
| Staff | 25 (43) |
| Sex, female | |
| Overall | 38 (66) |
| Patients | 14 (45) |
| Visitors | 2 (100) |
| Staff | 22 (88) |
| Acquisition | |
| Community | 5 (9) |
| Hospital | 53 (91) |
| Symptoms at time of diagnosis | |
| Symptomatic | 42 (72) |
| Asymptomatic | 16 (28) |
| Staff role | |
| Nurse or student nurse | 19 |
| Health care aide | 1 |
| Housekeeping staff | 1 |
| Pharmacist | 1 |
| Physician | 1 |
| Security guard | 1 |
| Service attendant | 1 |
| Critical care admissions | 1 (2)† |
| Deaths | 11 (19)‡ |
| Secondary cases linked to the outbreak (n = 13) | |
| Age, yr, mean (range) | 39 (3–84) |
| Sex, female | 2 (15) |
| Type of contact | |
| Household contact of patient | 4 (31) |
| Household contact of visitor | 1 (8) |
| Household contact of staff | 8 (61) |