Microbiological results from nasopharynx swabs in children with acute bronchiolitis treated at hospital in Oslo, Norway, before and after introduction of new treatment guidelines in 2013
| 2009 | 2014 | 2017 | |
| n=303 | n=278 | n=286 | |
| RS-virus (n (%)) | 181 (59.7) | 206 (74.1) | 214 (74.8) |
| Rhinovirus (n (%)) | * | 126 (45.3) | 117 (40.9) |
| Other viruses (n (%)) | 63 (20.8) | 78 (28.1) | 73 (25.5) |
| Bacteria (n (%)) | 5 (1.7) | 0 (0.0) | 4 (1.4) |
| Two or more agents (n (%)) | 11 (3.6)* | 79 (28.4) | 56 (19.6) |
| Negative results (n (%)) | 87 (28.7)* | 16 (5.8) | 12 (4.2) |
*Rhinovirus was not tested for in 2009.
RS-virus, respiratory syncytial virus.