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Table 2 The numbers of susceptible and resistant isolates in the training and validation dataset and clinical breakpoints for 24 drugs.

From: Using random forest to predict antimicrobial minimum inhibitory concentrations of nontyphoidal Salmonella in Taiwan

Drugs

Training

Resistant

Susceptible

log2MIC (Min., Q1, Q2, Q3, Max.)

Validation

Resistant

Susceptible

log2MIC (Min., Q1, Q2, Q3, Max.)

Clinical Breakpoint (μg/mL)

Amoxicillin

256

215

41

(−1, 8, 8, 8, 8)

65

54

11

(−1, 8, 8, 8, 8)

32

Ampicillin

167

135

32

(0, 8, 8, 8, 8)

42

33

9

(0, 8, 8, 8, 8)

32

Azithromycin

146

21

125

(1, 1, 1.5, 2, 8)

37

5

32

(1, 1, 2, 3, 8)

32

Cefotaxime

167

42

125

(−3, −3, −2,1, 6)

42

10

32

(−3, −3, −2, 1.25, 6)

4

Cefoxitin

146

46

100

(1, 2, 3, 6, 8)

37

11

26

(−3, 2, 3, 7, 8)

32

Ceftazidime

167

27

140

(−1, −1, 0, 1, 8)

42

7

35

(−1, 0, 0, 1, 8)

16

Ceftiofur

256

23

233

(−1, 0, 0, 1,8)

65

6

59

(−1, 0, 1, 1, 8)

32

Ceftriaxone

167

27

140

(−3, −3, −3, −2, 6)

42

6

36

(−3, −3, −2, −1.75, 4)

4

Chloramphenicol

256

178

78

(1, 3, 8, 8, 8)

65

45

20

(1, 4, 8, 8, 8)

32

Ciprofloxacin

256

27

229

(−7, −5, −3, −2, 4)

65

7

58

(−7, −3, −2, −1, 6)

1

Colistin

256

44

212

(−3, −3, −1, 1, 3)

65

12

53

(−3, − 3, − 1, 1, 6)

4

Enrofloxacin

256

2

254

(−1, −1, −1, −1, 5)

65

1

64

(−1, −1, −1, 0, 7)

32

Ertapenem

146

14

132

(−3, −3, −3, −3, 6)

37

3

34

(−3, −3, −3, −3, 6)

2

Florfenicol

256

161

95

(1, 3, 6, 8, 8)

65

41

24

(1, 3, 7, 8, 8)

32

Gentamicin

256

34

222

(−1, −1, −1, 1, 8)

65

9

56

(−1, −1, −1, 1, 8)

16

Kanamycin

256

73

183

(0, 1, 2, 8, 8)

65

19

46

(0, 1, 2, 8, 8)

64

Meropenem

167

1

166

(−3, −3, −3, −3, 6)

42

0

42

(−3, −3, −3, −3, −2)

4

Nalidixic Acid

256

102

154

(1, 2, 4, 8, 8)

65

26

39

(1, 2, 4, 8, 8)

32

Oxytetracycline

256

215

41

(0, 7, 8, 8, 8)

65

54

11

(0, 7, 8, 8, 8)

32

Streptomycin

167

122

45

(1, 4, 5, 8, 8)

42

30

12

(1, 4.75, 5, 8, 8)

32

Sulfonamide

167

119

48

(5, 7, 10, 10, 12)

42

29

13

(3, 9.75, 10, 10, 10)

512

Tetracycline

167

135

32

(−1, 6, 7, 8, 8)

42

34

8

(−1, 6, 7, 8, 8)

16

Tigecycline

167

0

167

(−3, −3, −2, −1, 0)

42

0

42

(−3, −2, −2, −1, −1)

4

Trimethoprim

167

115

52

(−1, −1, 8, 8, 8)

42

29

13

(−1, 6.25, 8, 8, 8)

16