Characteristics of patients and bronchoalveolar lavage (BAL) fluid and blood samples before enrichment
| Infants with bronchiolitis | Control infants | ||
| Preterm | Term | ||
| Clinical information | |||
| No of patients | 24 | 23 | 12 |
| Median (range) age on admission (weeks) | 3.5 (−5 to 11.7) | 16 (4–56) | 12 (6–20) |
| Weight on admission (kg) | 3.3 (0.35) | 5.1 (0.36) | 4.3 (2.0) |
| Median (range) gestation at birth (weeks) | 34 (27–36) | 40 (39–42) | 40 (37–40) |
| BAL fluid cell counts | |||
| Total cell concentration (×106 cells/ml) | 1.8 (0.8) | 1.9 (0.5) | 1.5 (0.8) |
| Total cell count (×106) | 4.5 (1) | 4.8 (1.2) | 3 (0.5) |
| Percentage of viable cells | 95 (2.5) | 94 (2) | 95 (1) |
| Median (range) percentage neutrophils | 84 (2.5) | 83 (2) | 37 (3) |
| Median (range) percentage alveolar macrophages | 12.5 (1.5) | 11.6 (1.0) | 47 (3) |
| Median (range) percentage lymphocytes | 5 (0.5) | 3.5 (1.0) | 7 (3) |
| Blood cell counts | |||
| No of patients | 16 | 15 | 8 |
| Total cell concentration (×109 cells/l) | 9.95 (1.67) | 9.95 (1.64) | 9.44 (1.5) |
| Percentage of viable cells | 97 (2) | 96 (1) | 96 (1) |
| Mean concentration (×109/l neutrophils) | 4.93 (1.46) | 5.11 (1.48) | 4.5 (1.56) |
| Mean concentration (×109/l monocytes) | 0.99 (0.15) | 1.11 (0.17) | 1.0 (0.18) |
| Mean concentration (×109/l lymphocytes) | 3.67 (0.3) | 3.57 (0.44) | 3.63 (0.35) |
| Mean concentration (×109/l eosinophils) | 0.088 (0.04) | 0.078 (0.029) | 0.082 (0.045) |
Data mean (SEM) unless stated otherwise.