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Table 2 Bacterial pathogens isolated from ETA

From: The utility of endotracheal aspirate bacteriology in identifying mechanically ventilated patients at risk for ventilator associated pneumonia: a single-center prospective observational study

Bacterial species

n

% of all subjects (n = 240)

% of subjects carrying pathogen in ETA (n = 125)

Staphylococcus aureus

71

29.6

56.8

 MRSA*

29

12.1

23.2

 MSSA*

43

17.9

34.4

Klebsiella pneumoniae

17

7.1

13.6

Pseudomonas aeruginosa

14

5.8

11.2

Escherichia coli

13

5.4

10.4

Haemophilus influenzae

9

3.8

7.2

Enterobacter cloacae

7

2.9

5.6

Enterobacter aerogenes

6

2.5

4.8

Stenotrophomonas maltophilia

6

2.5

4.8

Serratia marcescens

5

2.1

4.0

Klebsiella oxytoca

4

1.7

3.2

Diphtheroid

4

1.7

3.2

Burkholderia cepacia

3

1.3

2.4

Moraxella spp.

3

1.3

2.4

Achromobacter xylosoxidans

2

0.8

1.6

Streptococcus pneumoniae

2

0.8

1.6

Acinetobacter baumannii

2

0.8

1.6

β-hemolytic Group F Streptococci

2

0.8

1.6

Proteus mirabilis

2

0.8

1.6

Serratia rubidaea

1

0.4

0.8

Acinetobacter lwoffii

1

0.4

0.8

Alcaligenes denitrificans

1

0.4

0.8

Streptococcus agalactiae

1

0.4

0.8

β-hemolytic Group C Streptococci

1

0.4

0.8

Citrobacter freundii

1

0.4

0.8

  1. *Two subjects carried both MRSA and MSSA simultaneously. One of the 71 patients with S. aureus positive ETA excluded as the isolate was not tested for antibiotic susceptibility