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Table 3 Microbiological samples & Gram – and Gram +

From: Epidemiological analysis of intra-abdominal infections in Italy from the Italian register of complicated intra-abdominal infections—the IRIS study: a prospective observational nationwide study

Microbiological sample

N of positive

Gram – and Gram + 

n

%

Bloodstream cultures

7

Escherichia coli

4

57.2

  

Multi

1

14.3

  

Enterococcus

2

28.5

Intrabdominal cultures

1301

Acinetobacter baumannii

10

0.8

  

Bacteroides

33

2.5

  

Clostridium

7

0.5

  

Escherichia coli

594

45.6

  

Escherichia coli ESBL

44

3.4

  

Enterobacter

49

3.8

  

Klebsiella pneumoniae

56

4.3

  

MDR

125

9.6

  

Multi

209

16.1

  

Proteus

16

1.2

  

Pseudomonas aeruginosa

33

2.5

  

Citrobacter freundii

1

0.07

  

Serratia marcenscens

1

0.07

  

Staphylococcus areus

34

2.6

  

Staphylococcus capiti

1

0.07

  

Staphylococcus epidermidis

4

0.3

  

Staphylococcus hominis OXA-R

1

0.07

  

Streptococcus

128

9.8

  

Streptococcus constellatus

1

0.07

  

Staphylococcus spp

1

0.07

Bloodstream & intra-abdominal cultures

53

Clostridium

2

3.8

  

Escherichia coli

12

22.6

  

Enterobacter

4

7.5

  

Klebsiella pneumoniae

1

1.9

  

MDR

5

9.4

  

Multi

10

19

  

Pseudomonas aeruginosa

3

5.7

  

Enterococcus

9

16.9

  

Staphylococcus areus

1

1.9

  

Staphylococcus capitis

1

1.9

  

Staphylococcus epidermidis

1

1.9

  

Streptococcus

3

5.7

  

Staphylococcus capitis

1

1.9

  1. Data are presented as actual number (n), mean ± Standard deviation or percentage () where appropriate. MDR; Multidrug resistance: ESBL: Extended Spectrum Beta-Lactamase: Multi: association of antibiotic