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Table 2 Diagnostic criteria for infection and the microorganisms isolated in patients with abdominal and respiratory infections

From: Infections of respiratory or abdominal origin in ICU patients: what are the differences?

Characteristic

All patients

(n = 542)

Abdominal infection

(n = 162)

Respiratory infection

(n = 380)

P-value

Diagnostic criteria

    

   Isolates only

44 (8.1%)

9 (5.6%)

35 (9.2%)

0.17

   Clinical only

294 (54.2%)

91 (56.2%)

203 (53.4%)

0.57

   Both

204 (37.6%)

62 (38.3%)

142 (37.4%)

0.85

Class/microorganism

    

   Gram-positive

130 (23.9%)

42 (25.9%)

88 (23.2%)

0.58

   Gram-negative

144 (26.5%)

43 (26.5%)

101 (26.6%)

0.64

   Anaerobes

9 (1.6%)

7 (4.3%)

2 (0.5%)

0.45

   Atypical microorganisms

4 (0.7%)

0

4 (1.1%)

0.323

   Fungi

81 (14.9%)

30 (18.5%)

51 (13.4%)

0.148

Gram-positive

    

   Any Staphylococcus

119 (22.0%)

36 (22.2%)

83 (21.8%)

0.92

Staphylococcus aureus

91 (16.8%)

30 (18.5%)

61 (16.1%)

0.48

MRSA

59 (10.9%)

22 (13.6%)

37 (9.7%)

0.18

Staphylococcus, others

70 (12.9%)

19 (11.7%)

51 (13.4%)

0.59

   Any Streptococcus

88 (16.2%)

39 (24.1%)

49 (12.9%)

< 0.001

Streptococcus group D

54 (10.0%)

30 (18.5%)

24 (6.3%)

< 0.001

Streptococcus pneumoniae

19 (3.5%)

1 (0.6%)

18 (4.7%)

0.02

Streptococcus, others

19 (3.5%)

9 (5.6%)

10 (2.6%)

0.09

   Gram-positive bacilli

15 (2.8%)

3 (1.9%)

12 (3.2%)

0.57

   Gram-positive, others

10 (1.8%)

1 (0.6%)

9 (2.4%)

0.29

Gram-negative

    

   Pseudomonas species

67 (12.4%)

19 (11.7%)

48 (12.6%)

0.77

   Escherichia coli

54 (10.0%)

25 (15.4%)

29 (7.6%)

0.006

   Enterobacter

25 (4.6%)

11 (6.8%)

14 (3.7%)

0.11

   Klebsiella

25 (4.6%)

6 (3.7%)

19 (5.0%)

0.51

   Proteus

15 (2.8%)

6 (3.7%)

9 (2.4%)

0.38

   Acinetobacter

17 (3.1%)

2 (1.2%)

15 (3.9%)

0.11

   Haemophilus

12 (2.2%)

1 (0.6%)

11 (2.9%)

0.12

   Gram-negative bacilli

36 (6.6%)

12 (7.4%)

24 (6.3%)

0.64

   Gram-negative, others

90 (16.6%)

26 (16.0%)

64 (16.8)

0.82

Fungi

    

   Candida albicans

61 (11.3%)

21 (13.0%)

40 (10.5%)

0.41

   Candida, others

19 (3.5%)

10 (6.2%)

9 (2.4%)

0.02

   Fungi, others

7 (1.3%)

2 (1.2%)

5 (1.3%)

1

Viral/parasitic

9 (1.7%)

1 (0.6%)

8 (2.1%)

0.21

  1. CSF: cerebrospinal fluid; MRSA: methicillin-resistant S. aureus; Staphylococcus, others includes methicillin-sensitive S. aureus and Staphylococcus coagulase negative methicillin-sensitive; Streptococcus, others includes Streptococcus A, B, C, G group and others; Gram-positive bacilli includes, Moraxella and others; Gram-negative, others includes Salmonella, Serratia, Citrobacter, Stenotrophomonas maltophilia, Campylobacter, other enterobacteroids, Gram-negative cocci; Anaerobes includes Clostridium, Bacteroides, anaerobic cocci, and others; Atypical microorganisms includes Mycobacteria, Chlamydia, Rickettsia, Legionella pneumonia; Fungi, others includes Aspergillus and others. The microorganism was considered once per patient even if present in more than one site.
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Critical Care

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