Table 1 Characteristics of sporadic and epidemic cases of residents with influenza-like illness (ILI) November 2009-March 2010
From: Surveillance of influenza-like illness in Belgian nursing homes
| Residents with ILI |
Sporadic cases (4 NHs) |
Epidemic cases NH-1 |
Epidemic cases NH-2 |
Total (6 NHs) |
|---|---|---|---|---|
| Number of cases | 4 | 13 | 30 | 47 |
| Mean age (years) | 82.8 | 89.9 | 84.1 | 85.6 |
| Date of first/last ILI case | 3 Nov/3 Dec | 2 Nov/15 Feb | 15 Nov/16 Feb | 2 Nov/16 Feb |
| Risk factors (comorbidity) | ||||
| No risk factor | 1 (25.0%) | 2 (15.4%) | 6 (20.0%) | 9 (19.1%) |
| Only 1 | 2 (50.0%) | 5 (38.5%) | 8 (26.7%) | 15 (31.9%) |
| 2 or more | 1 (25.0%) | 6 (46.2%) | 16 (53.3%) | 23 (48.9%) |
| Vaccination status | ||||
| Seasonal flu | 4 (100.0%) | 12 (92.3%) | 29 (96.7%) | 45 (95.7%) |
| A(H1N1)2009 | 2 (50.0%) | 10 (76.9%) | 29 (96.7%) | 41 (87.2%) |
| Treatment for ILI | ||||
| Antiviral only | 2 (50.0%) | 0 (0.0%) | 0 (0.0%) | 2 (4.3%) |
| Antibiotic only | 1 (25.0%) | 9 (69.2%) | 25 (83.3%) | 35 (74.5%) |
| Other only (antipyretic, analgesic,...) | 1 (25.0%) | 3 (23.1%) | 5 (16.7%) | 9 (19.1%) |
| No treatment | 0 (0.0%) | 1(7.7%) | 0 (0.0%) | 1 (2.1%) |
| Clinical issue§ | ||||
| Deceased* | 0 (0.0%) | 0 (0.0%) | 5 (16.7%) | 5 (10.6%) |
| Hospitalised | 0 (0.0%) | 1 (7.7%) | 19 (63.3%) | 20 (42.6%) |
| Complication | 1 (25.0%) | 11 (84.6%) | 5 (16.7%) | 17 (36.2%) |