Table 3– Distribution of the causative microorganisms identified in community-acquired pneumonia outpatients
Total populationPopulation with defined aetiology
Patients n568188
Streptococcus pneumoniae66 (11.6)66 (35.1)
Streptococcus viridans2 (0.4)2 (1.1)
Staphylococcus aureus1 (0.2)1 (0.5)
Haemophilus influenzae9 (1.58)9 (4.8)
Escherichia coli1 (0.2)1 (0.5)
Pseudomonas aeruginosa1 (0.2)1 (0.5)
Others3 (0.5)3 (1.6)
Atypical63 (11.1)63 (33.5)
Legionella pneumophila13 (2.3)13 (6.9)
Mycoplasma pneumoniae29 (5.1)29 (15.4)
Coxiella burnetii11 (1.9)11 (5.9)
Chlamydophila pneumoniae10 (1.8)10 (5.3)
Respiratory virus25 (4.4)25 (13.3)
 Rhinovirus6 (1.1)6 (24.0)
 Influenza virus A14 (2.5)14 (56.0)
 Influenza virus B2 (0.4)2 (8.0)
 Adenovirus1 (0.2)1 (4.0)
 Respiratory syncytial virus1 (0.2)1 (4.0)
 Parainfluenza virus 21 (0.2)1 (4.0)
Mixed17 (3.0)17 (9.0)
S. pneumoniae + influenza A virus9 (1.6)9 (52.9)
H. influenzae + influenza virus A2 (0.4)2 (11.7)
S. pneumoniae + H. influenzae2 (0.4)2 (11.7)
S. pneumoniae + adenovirus1 (0.2)1 (5.8)
S. pneumoniae + P. aeruginosa1 (0.2)1 (5.8)
S. pneumoniae + rhinovirus1 (0.2)1 (5.8)
L. pneumophila + rhinovirus1 (0.2)1 (5.8)
  • Data are presented as n (%), unless otherwise stated.