Table III.
Virus findings among children with laryngeal croup and acute wheezing illness during the 1-year study
| Croup n = 144 | Wheezing n = 76 | |||
|---|---|---|---|---|
| Parainfluenza virus 1⁎ | 44 | 30.6% | 3 | 3.9% |
| Parainfluenza virus 2† | 7 | 4.9% | 0 | 0.0% |
| Parainfluenza virus 3 | 9 | 6.3% | 1 | 1.3% |
| Respiratory syncytial virus‡ | 21 | 14.6% | 21 | 27.6% |
| Human bocavirus | 18 | 12.5% | 8 | 10.5% |
| Rhinovirus | 17 | 11.8% | 9 | 11.8% |
| Enterovirus | 13 | 9.0% | 10 | 13.2% |
| Influenza A | 13 | 9.0% | 10 | 13.2% |
| Coronavirus | 3 | 2.1% | 1 | 1,3% |
| Adenovirus | 2 | 1.4% | 0 | 0.0% |
| M. pneumoniae | 1 | 0.7% | 1 | 1.3% |
| Human metapneumovirus | 0 | 0.0% | 2 | 2.6% |
| Influenza B | 0 | 0.0% | 0 | 0.0% |
| No. of detected viruses§ | 148 | 66 | ||
| Virus positive | 115 | 79.9% | 54 | 71.1% |
| Virus negative | 29 | 20.1% | 22 | 28.9% |
⁎
P < .001 between croup and wheezy bronchitis (χ2 test).
†
P < .05 between croup and wheezy bronchitis (χ2 test).
‡
P < .01 between croup and wheezy bronchitis (χ2 test).
§
Some samples harbored more than 1 virus type.