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Table 2 Isolates from the specimen taken for microbiological proof of infection with 48 hours after enrolment

From: Multinational, observational study of procalcitonin in ICU patients with pneumonia requiring mechanical ventilation: a multicenter observational study

  CAP N= 57 HAP N= 57 VAP N= 61 Total N= 175
Negative 21 (36.8%) 21 (36.8%) 15 (24.6%) 57 (32.6%)
Gram positive bacteria 22 (38.6%) 22 (38.6%) 31 (50.8%) 75 (42.9%)
MSSA 8 (14.0%) 10 (17.5%) 16 (13.9%) 34 (11.6%)
Streptococcus spp. 8 (14.0%) 4 (7.0%) 5 (4.3%) 17 (5.7%)
MRSA 4 (7.0%) 1 (1.8%) 0 (0%) 5 (1.7%)
Enterococcus spp. 0 (0%) 0 (0%) 4 (6.6%) 4 (2.3%)
Other 2 (3.5%) 7 (12.3%) 6 (9.8%) 15 (8.6%)
Gram negative bacteria 22 (38.6%) 19 (33.3%) 22 (36.1%) 63 (36.0%)
Pseudomonas spp. 5 (8.8%) 5 (8.8%) 6 (9.8%) 16 (5.4%)
E. coli 5 (8.8%) 3 (5.3%) 4 (6.6%) 12 (4.1%)
Haemophilus spp. 3 (5.3%) 3 (5.3%) 4 (6.6%) 10 (3.4%)
Klebsiella spp. 2 (3.5%) 2 (3.5%) 2 (3.3%) 6 (2.0%)
Proteus spp. 0 (0%) 0 (0%) 3 (4.9%) 3 (1.7%)
Other 7 (12.3%) 6 (10.5%) 3 (4.9%) 16 (9.1%)
Yeasts 4 (7.0%) 9 (15.8%) 8 (13.1%) 21 (12.0%)
  1. CAP, community acquired pneumonia; HAP, hospital acquired pneumonia; E. coli, Escherichia coli; MRSA, methicillin-resistent staphylococcus aureus; MSSA, methicillin-sensitive staphylococcus aureus; spp., species; VAP, ventilator associated pneumonia.