Frequency of pathogens identified in addition to Legionella spp. in the 40 admissions
| Pathogen | n (%) |
| Viral agents | |
| Influenza virus type A | 1 (2) |
| Influenza virus type B | 2 (5) |
| Parainfluenza virus type 1 | 2 (5) |
| Parainfluenza virus type 2 | 9 (22) |
| Parainfluenza virus type 3 | 1 (2) |
| Adenovirus | 1 (2) |
| Respiratory syncytial virus | 2 (5) |
| Bacterial agents | |
| Streptococcus pneumoniae | 12 (30) |
| Haemophilus influenzae | 4 (10) |
| Moraxella catarrhalis | 2 (5) |
| Atypical bacterial agents | |
| Mycoplasma pneumoniae | 3 (7) |