Subjects | Median CRP level | Size of range | Interquartile range | |
Streptococcus pneumoniae# | 55 (19.0) | 278.0 | 686 | 147–390 |
Haemophilus influenzae | 9 (3.1) | 214.0 | 278 | 168–313 |
Staphylococcus aureus¶ | 8 (2.8) | 187.0 | 299 | 115–330 |
Chlamydia pneumoniae | 10 (3.5) | 115.5 | 328 | 57–317 |
Mycoplasma pneumoniae | 5 (1.7) | 49.0 | 299 | 27–228 |
Legionella pneumophila+ | 7 (2.4) | 247.0 | 286 | 176–421 |
Enterobacteriaciae§ | 15 (5.2) | 129.0 | 452 | 53–272 |
Moraxella catarrhalis | 5 (1.7) | 64.0 | 197 | 49–165 |
Other pathogensƒ | 11 (3.8) | 185.0 | 403 | 117–231 |
Multiple bacterial pathogens | 12 (4.2) | 213.0 | 672 | 83–404 |
Unknown aetiology | 152 (52.6) | 140.5 | 576 | 56–293 |
#: determined by sputum culture (n = 19), blood culture (n = 24) or urinary antigen test (n = 20), in eight cases S. pneumoniae was determined by multiple tests; ¶: determined by sputum culture (n = 6) or blood culture (n = 2); +: all determined by both serology and urinary antigen test (n = 7); §: Enterobacteriaciae include: Eschericia Coli (n = 6; 2.1%); Klebsiella pneumoniae (n = 4; 1.4%); Proteus mirabilis. (n = 1; 0.3%); Enterobacter spp. (n = 2; 0.7%); Citrobacter spp. (n = 2; 0,7%); ƒ:other pathogens include: P. aeruginosa (n = 2; 0.7%); Streptococcus agalactiae (n = 3; 1.0%); H. parainfluenzae (n = 2; 0.7%); Staphylococcus hominis (n = 1; 0.3%); Proprionibacter acnes (n = 1; 0.3%); Gram-positive spp. (n = 2; 0.7%).