Table 3.
Microbiologic diagnosis in 525 children and adolescents with community acquired pneumonia, stratified by age group
| Respiratory pathogen | Age by groups | Total | ||
|---|---|---|---|---|
| 1–23 months N = 206 n (%) |
2–4 years N = 213 n (%) |
≥5 years N = 106 n (%) |
n/525 (%) | |
| Respiratory syncytial virus A and B | 91 (44.2) | 56 (26.3) | 17 (16.0) | 164 (31.2) |
| Parainfluenza virus 1, 2, 3, 4 | 51 (24.8) | 53 (24.9) | 18 (17.0) | 122 (23.2) |
| Rhinovirus A/B/C | 41 (19.9) | 49 (23.0) | 21 (19.8) | 111 (21.1) |
| Influenza virus A and B | 42 (20.4) | 37 (17.4) | 17 (16.0) | 96 (18.3) |
| Mycoplasma pneumoniae | 22 (10.7) | 37 (17.4) | 14 (13.2) | 73 (13.9) |
| Adenovirus | 32 (15.5) | 27 (12.7) | 9 (8.5) | 68 (13.0) |
| Streptococcus pneumoniae | 24 (11.7) | 28 (13.1) | 7 (6.6) | 59 (11.2) |
| Moraxella catarrhalis | 23 (11.2) | 15 (7.0) | 3 (2.8) | 41 (7.8) |
| Metapneumovirus | 23 (11.2) | 9 (4.2) | 5 (4.7) | 37 (7.0) |
| Bordetella pertussis | 12 (5.8) | 7 (3.3) | 6 (5.7) | 25 (4.8) |
| Haemophilus influenzae | 12 (5.8) | 7 (3.3) | 5 (4.7) | 24 (4.6) |
| Coronavirus 229E/NL63 and OC43 | 6 (2.9) | 7 (3.3) | 2 (1.9) | 15 (2.9) |
| Staphylococcus aureus | 3 (1.4) | 3 (1.4) | 5 (4.7) | 11 (2.1) |
| Chlamydophila pneumoniae | 0 (0) | 3 (1.4) | 7 (6.6) | 10 (1.9) |
| Legionella pneumophila | 0 (0) | 3 (1.4) | 6 (5.7) | 9 (1.7) |
| Mycobacterium tuberculosis | 3 (1.4) | 2 (0.9) | 1 (0.9) | 6 (1.1) |
| Enterovirus | 2 (1.0) | 2 (0.9) | 2 (1.9) | 6 (1.1) |
| Enterobacteriaceaea | 3 (1.4) | 2 (0.9) | 1 (0.9) | 6 (1.1) |
| Coxiella burnetii | 3 (1.4) | 2 (0.9) | 0 (0) | 5 (1.0) |
| Other Gram-positive bacteriab | 2 (1.0) | 1 (0.5) | 0 (0) | 3 (0.6) |
| Bocavirus 1/2/3/4 | 2 (1.0) | 0 (0) | 0 (0) | 2 (0.4) |
| Gram-negative bacillic | 1 (0.5) | 1 (0.5) | 0 (0) | 2 (0.4) |
| Chlamydia trachomatis | 1 (0.5) | 0 (0) | 0 (0) | 1 (0.2) |
| Haemophilus parainfluenzae | 1 (0.5) | 0 (0) | 0 (0) | 1 (0.2) |
| No identified microorganism | 21 (10.2) | 38 (17.8) | 25 (23.6) | 84 (16.0) |
| At least one virus | 170 (82.5) | 145 (68.1) | 63 (59.4) | 378 (72) |
| At least one pyogenic bacterium | 65 (31.6) | 61 (28.6) | 23 (21.7) | 149 (28.4) |
| At least one atypical bacterium | 35 (17) | 46 (21.6) | 30 (28.3) | 111 (21.1) |
a Escherichia coli, Enterobacter cloacae
b Enterococcus spp., Streptococcus spp., Staphylococcus epidermidis
c Sphingomonas paucimobilis, Acinetobacter baumanii