Table 3 Distribution of the causative microorganisms identified in 196 patients with community-acquired pneumonia

Streptococcus pneumoniae

94 (60)

28 (72)

0.17

23 (70)

5 (83)

Streptococcus pyogenes

1 (1)

1 (3)

0.36

1 (3)

-

Streptococcus viridans ^a

-

1 (3)

0.20

1 (3)

-

Staphylococcus aureus (MSSA)

4 (3)

3 (8)

0.12

2 (6)

1 (17)

Staphylococcus aureus (MRSA)

5 (3)

9 (23)

< 0.001

5 (15)

4 (67)

Haemophilus influenzae

4 (3)

4 (10)

0.029

3 (9)

1 (17)

Moraxella catarrhalis

1 (1)

2 (5)

0.041

1 (3)

1 (17)

Gram-negative enteric bacilli^b

6 (4)

7 (18)

0.002

5 (15)

2 (33)

Pseudomonas aeruginosa

6 (4)

8 (21)

< 0.001

6 (18)

2 (33)

Respiratory viruses

16 (10)

15 (39)

< 0.001

14 (42)

1 (17)

   Rhinovirus

2 (1)

2 (5)

0.13

2 (6)

-

   Adenovirus

1 (1)

1 (3)

0.36

1 (3)

-

   Respiratory syncitial virus

2 (1)

2 (5)

0.13

2 (6)

-

   Influenza virus A

10 (6)

9 (23)

0.002

8 (24)

1 (17)

   Influenza virus B

1 (1)

1 (3)

0.36

1 (3)

-

   Legionella pneumophila

10 (6)

1 (3)

0.36

1 (3)

-

Atypical

10 (6)

5 (13)

0.18

4 (12)

1 (17)

   Mycoplasma pneumoniae

4 (3)

2 (5)

0.40

2 (6)

-

   Chlamydophila pneumoniae

4 (3)

2 (5)

0.40

1 (3)

1 (17)

   Coxiella burnetii

2 (1)

1 (3)

0.49

1 (3)

-