Table 2.
Distribution of respiratory virus infections by age group (combined results of culture, PCR, and serology)
| Virusa | No. of infections in each age group (yrs) (n) |
||||||
|---|---|---|---|---|---|---|---|
| <1 (55) | 1–4 (57) | 5–17 (50) | 18–44 (65) | 45–64 (114) | ≥65 (62) | All ages (403) | |
| Picornaviruses | |||||||
| Enterovirus | 3 | 0 | 2 | 0 | 0 | 0 | 5 |
| Rhinovirus | 15 | 6 | 8 | 8 | 9 | 3 | 49 |
| Unclassified | 13 | 11 | 17 | 6 | 5 | 2 | 54 |
| Paramyxoviruses | |||||||
| PIV1 | 0 | 3 | 0 | 0 | 0 | 0 | 3 |
| PIV2 | 2 | 3 | 0 | 0 | 0 | 0 | 5 |
| PIV3 | 3 | 3 | 0 | 0 | 2 | 1 | 9 |
| RSV | 15 | 14 | 5 | 1 | 2 | 2 | 39 |
| HMPV | 2 | 4 | 0 | 2 | 2 | 2 | 12 |
| Orthomyxoviruses | |||||||
| Influenza A | 0 | 4 | 2 | 6 | 11 | 3 | 26 |
| Influenza B | 0 | 2 | 0 | 0 | 0 | 1 | 3 |
| Coronaviruses | |||||||
| OC43 | 0 | 0 | 0 | 1 | 6 | 0 | 7 |
| 229E | 0 | 0 | 0 | 0 | 1 | 2 | 3 |
| Adenoviruses | 1 | 1 | 0 | 1 | 1 | 0 | 4 |
| Herpesviruses | |||||||
| HSV | 0 | 0 | 1 | 2 | 6 | 4 | 13 |
| CMV | 2 | 0 | 0 | 1 | 0 | 0 | 3 |
| Any virusb | 43 | 44 | 31 | 24 | 42 | 16 | 200 |
| Multiple viruses | 11 | 7 | 4 | 4 | 3 | 4 | 33 |
a
PIV, parainfluenza virus; RSV, respiratory syncytial virus; HMPV, human metapneumovirus; HSV, herpes simplex virus; CMV, cytomegalovirus.
b
This category corresponds to persons with at least one virus.