Table 2.
Distribution of bacteria and viruses during periods of no wheeze, signs of clinical pneumonia, and wheezy episodes. Values are percentages (numbers) unless stated otherwise
| Variables | No wheeze | Clinical pneumonia | Wheezy episodes |
|---|---|---|---|
| Median age of sampling (months) | 12 | 15 | 14 |
| Bacteria: | n=279 | n=144 | n=400 |
| Streptococcus pneumoniae | 38 (105) | 59 (85) | 46 (185) |
| Haemophilus influenzae | 26 (73) | 47 (67) | 44 (174) |
| Moraxella catarrhalis | 29 (81) | 52 (76) | 50 (199) |
| Staphylococcus aureus | 20 (57) | 9 (13) | 15 (61) |
| Streptococcus pyogenes | <1 (2) | <1 (1) | 1 (4) |
| Percentage ciliated columnar epithelium | 60 | 79 | 76 |
| Viruses: | n=87 | n=181 | n=481 |
| Picornaviruses | 22 (19) | 27 (48) | 29 (141) |
| Respiratory syncytial virus | 9 (8) | 30 (55) | 17 (80) |
| Coronaviruses | 10 (9) | 12 (22) | 13 (61) |
| Parainfluenza viruses 1 to 3 | 0 (0) | 7 (13) | 8 (39) |
| Influenza viruses | 2 (2) | 8 (14) | 6 (31) |
| Bocavirus | 1 (1) | 6 (10) | 8 (40) |
| Human metapneumoviruses | 0 (0) | 4 (7) | 4 (18) |
| Adenoviruses | 1 (1) | <1 (1) | 1 (5) |
| Any virus type | 40 (35) | 70 (127) | 65 (315) |
| Multiple types | 6 (5) | 22 (40) | 18 (85) |