Skip to main content

Table 4 Distribution of single and multiple bacterial and viral agents detected in 167 adults with an etiologically established diagnosis of community-acquired pneumonia

From: Etiology of community-acquired pneumonia and diagnostic yields of microbiological methods: a 3-year prospective study in Norway

Bacterial agents
  Pure bacterial infections (n = 75) Viral–bacterial coinfections (n = 51) Total
  Only one Plus other bacterium Plus virus a Plus virus and other bacterium N (%)
Streptococcus pneumoniae 37 8 29 7 81 (49)
Bordetella pertussis 2 4 4 5 15 (9)
Haemophilus influenzae 2 5 5 2 14 (8)
Mycoplasma pneumoniae 7 3    10 (6)
Chlamydophila pneumoniae 5 1   1 7 (4)
Legionella pneumophila 2 3   2 7 (4)
Enterobacteriaceae 1 3 2   6 (4)
Moraxella catarrhalis 2   1 2 5 (3)
Miscellaneous b 1 1   1 3 (2)
Haemophilus parainfluenzae 1 1    2 (1)
Subtotal cases with bacteria 60     126 (75)c
Viral agents
  Pure viral infections (n = 41) Viral–bacterial coinfections (n = 51) Total
  Only one Plus other virus Plus bacterium a Plus bacterium and other virus N (%)
Influenza viruses 15d 2 21 2 40 (24)
Rhinovirus 12 2 15 3 32 (19)
Parainfluenza viruses 3   4 1 8 (5)
Respiratory syncytial virus 3 2 2   7 (4)
Metapneumovirus 3   3 1 7 (4)
Enterovirus 2   1 2 5 (3)
Adenovirus     1 1 (0.6)
Subtotal cases with viruses 39     92 (55)c
  1. Note: Drammen, Norway, January 2008–January 2011.
  2. aOne or two.
  3. bGroup A streptococcus; Prevotella spp.; Dialister pneumosintes.
  4. cPatients with multiple agents detected were counted as one individual case.
  5. dOne patient was also coinfected with Pneumocystis jirovecii.