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Table 3 Antimicrobial susceptibility testing results of cultured pathogens

From: Detection of aerobe–anaerobe mixed infection by metagenomic next-generation sequencing in an adult suffering from descending necrotizing mediastinitis

Pathogen

Antimicrobial agent

Method (unit)

Interpretive standard

 

S

I

R

Result

Sensitivity

Streptococcus anginosus

Penicillin

MIC (ug/ml)

 ≤ 0.12

0.25–2

 ≥ 4

0.064

S

 

Linezolid

KB (mm)

 ≥ 21

NA

NA

28

S

 

Levofloxacin

KB (mm)

 ≥ 17

14–16

 ≤ 13

28

S

 

Ceftriaxone

KB (mm)

 ≥ 27

25–26

 ≤ 24

30

S

 

Vancomycin

KB (mm)

 ≥ 17

NA

NA

22

S

 

Erythromycin

KB (mm)

 ≥ 21

16–20

 ≤ 15

6

R

 

Azithromycin

KB (mm)

 ≥ 18

14–17

 ≤ 13

6

R

 

Clindamycin

KB (mm)

 ≥ 19

16–18

 ≤ 15

6

R

 

Clarithromycin

KB (mm)

 ≥ 21

17–20

 ≤ 16

6

R

 

Tetracycline

KB (mm)

 ≥ 23

19–22

 ≤ 18

30

S

Staphylococcus hominis

Penicillin

MIC (ug/ml)

 ≤ 0.12

NA

 ≥ 0.25

 ≥ 0.50

R

 

Vancomycin

MIC (ug/ml)

 ≤ 4

8–16

 ≥ 32

1.0

S

 

Gentamicin

MIC (ug/ml)

 ≤ 4

8

 ≥ 16

1.0

S

 

Clindamycin

MIC (ug/ml)

 ≤ 0.5

1–2

 ≥ 4

 ≥ 8.0

R

 

Tetracycline

MIC (ug/ml)

 ≤ 4

8

 ≥ 16

 ≥ 16.0

R

 

Ciprofloxacin

MIC (ug/ml)

 ≤ 1

2

 ≥ 4

1.0

S

 

Levofloxacin

MIC (ug/ml)

 ≤ 1

2

 ≥ 4

0.5

S

 

Moxifloxacin

MIC (ug/ml)

 ≤ 0.5

1

 ≥ 2

 ≤ 0.25

S

 

Smz-tmp

MIC (ug/ml)

 ≤ 2/38

NA

 ≥ 4/76

80.0

R

 

Rifampicin

MIC (ug/ml)

 ≤ 1

2

 ≥ 4

 ≤ 0.5

S

 

Quinupristin/dalfopristin

MIC (ug/ml)

 ≤ 1

2

 ≥ 4

0.5

S

 

Linezolid

MIC (ug/ml)

 ≤ 4

NA

 ≥ 8

2.0

S

 

Erythromycin

MIC (ug/ml)

 ≤ 0.5

1–4

 ≥ 8

 ≥ 8.0

R

 

Oxacillin

MIC (ug/ml)

 ≤ 0.25

NA

 ≥ 0.5

 ≥ 4.0

R

 

Methicillin resistance

     

Positive

Pseudomonas aeruginosa

Piperacillin/tazobactam

MIC (ug/ml)

 ≤ 16/4

32/4–64/4

 ≥ 128/4

16.0

S

 

Ceftazidime

MIC (ug/ml)

 ≤ 8

16

 ≥ 32

32.0

R

 

Imipenenm

MIC (ug/ml)

 ≤ 2

4

 ≥ 8

 ≥ 16.0

R

 

Meropenem

MIC (ug/ml)

 ≤ 2

4

 ≥ 8

 ≤ 0.25

S

 

Amikacin

MIC (ug/ml)

 ≤ 16

32

 ≥ 64

 ≥ 64.0

R

 

Ciprofloxacin

MIC (ug/ml)

 ≤ 0.5

1

 ≥ 2

0.5

S

 

Levofloxacin

MIC (ug/ml)

 ≤ 1

2

 ≥ 4

1.0

S

 

Cefoperazone/sulbactam

MIC (ug/ml)

 ≤ 16

32

 ≥ 64

32.0

I

 

Cefepime

MIC (ug/ml)

 ≤ 8

16

 ≥ 32

16.0

I

 

Tobramycin

MIC (ug/ml)

 ≤ 4

8

 ≥ 16

2.0

S

 

Polymyxin

MIC (ug/ml)

 ≤ 2

NA

 ≥ 4

2.0

S

 

Gentamicin

KB (mm)

 ≥ 15

13–14

 ≤ 12

17

S