Table 3

Pathogens in pneumonic patients and patients without pneumonia.

BacteriaTotal (n = 364)Pneumonia (n = 48)Non-pneumonic LRTI (n = 316)P-value
Streptococcus pneumoniae23 (6)7 (15)16 (5)0.021
Haemophilus influenzae15 (4)2 (4)13 (4)1.000
Mycoplasma pneumoniae11 (3)4 (8)7 (2)0.041
Moraxella catarrhalis4 (1)04 (1)1.000
Chlamydophila pneumoniae2 (<1)02 (<1)1.000
Staphylococcus aureus2 (<1)1 (2)1 (<1)0.248
Gram negative bacillia6 (2)06 (2)1.000
Legionella pneumophila000-
Other bacteria9 (2)3 (6)6 (2)0.102
Patients with bacteriab69 (19)16 (33)53 (17)0.010
Virus
Rhinovirus37 (11)3 (6)34 (11)0.447
Influenza A virus23 (7)2 (4)21 (7)0.752
Respiratory syncytial virus15 (4)015 (5)0.236
Influenza B virus12 (3)012 (4)0.379
Human metapneumovirus6 (2)1 (2)5 (2)0.575
Parainfluenza virus type 32 (<1)02 (<1)1.000
Adenovirus000-
Patients with virusc89 (24)6 (13)83 (26)0.046
Patients with any pathogend145 (40)21 (44)124 (39)0.635
  • Data are shown as numbers (%).

  • a Gram negative rods other than Haemophilus species and Legionella.

  • b More than one bacterium detected: three patients.

  • c More than one virus detected: six patients.

  • d Mixed bacterial and viral infection: 13 patients. LRTI = lower respiratory tract infection.