Table 1 Identified causative microorganisms

Bacterial species

Bacterial pneumonia

(N = 108)

Purely bacterial pneumonia

(N = 77)

Mixed bacterial–viral pneumonia

(N = 31)

Streptococcus pneumoniae

48 (44.4)

29 (37.7)

19 (61.3)

Haemophilus influenzae

26 (24.1)

19 (24.7)

7 (22.6)

Staphylococcus aureus

12 (11.1)

9 (11.7)

3 (9.7)

Klebsiella pneumoniae

10 (9.3)

9 (11.7)

1 (3.2)

Moraxella catarrhalis

8 (7.4)

4 (5.2)

4 (12.9)

Haemophilus parainfluenzae

3 (2.8)

3 (3.9)

-

Pseudomonas aeruginosa

3 (2.8)

2 (2.6)

1 (3.2)

Legionella pneumophila

2 (1.9)

2 (2.6)

-

Streptococcus mitis

1 (0.9)

1 (1.3)

-

Streptococcus pyogenes

1 (0.9)

-

1 (3.2)

Acinetobacter lwoffii

1 (0.9)

1 (1.3)

-

Capnocytophaga gingivalis

1 (0.9)

1 (1.3)

-

Escherichia coli

1 (0.9)

1 (1.3)

-

Klebsiella ornithinolytica

1 (0.9)

1 (1.3)

-

Klebsiella variicola

1 (0.9)

1 (1.3)

-

Viral species

Viral pneumonia

(N = 49)

Purely viral pneumonia

(N = 18)

Mixed bacterial–viral pneumonia

(N = 31)

Human rhinovirus/enterovirus

21 (42.9)

6 (33.3)

15 (48.4)

Human metapneumovirus

9 (18.4)

5 (27.8)

4 (12.9)

Influenza A

7 (14.3)

2 (11.1)

5 (16.1)

Respiratory syncytial virus

5 (10.2)

3 (16.7)

2 (6.5)

Parainfluenza virus 1

3 (6.1)

1 (5.6)

2 (6.5)

Coronavirus oc43

2 (4.1)

-

2 (6.5)

Parainfluenza virus 3

2 (4.1)

1 (5.6)

1 (3.2)

Adenovirus

1 (2.0)

-

1 (3.2)

Parainfluenza virus 2

1 (2.0)

1 (5.6)

-