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Table 2 MIC distribution of BDQ resistant isolates against SM, EMB, KM and OFX

From: Investigation of bedaquiline resistance and genetic mutations in multi-drug resistant Mycobacterium tuberculosis clinical isolates in Chongqing, China

Drug resistance profile

No. of strains

No. of strains with different MIC (μg/ml)

No. (%) of BDQ resistant strains

≤ 0.008

0.016

0.031

0.063

0.125

0.25

0.5

1

2

4

8

All isolates

205

8

28

77

50

26

7

6

3

0

0

0

9 (4.4)

Fully susceptible isolates

31

2

6

13

7

1

2

0

0

0

0

0

0(0)

Resistant to one drug

56

4

5

22

15

7

2

1

0

0

0

0

1(1.8)

Resistant to two drugs

76

1

11

30

17

11

3

3

0

0

0

0

3 (3.9)

Resistant to three drugs

35

1

4

11

9

5

1

2

2

0

0

0

4(11.4)

Resistant to four drugs

7

0

2

1

2

1

0

1

0

0

0

0

1(14.4)

Resistant to SM

148

3

18

57

35

23

5

6

1

0

0

0

7(4.7)

Resistant to EMB

77

2

9

28

17

12

3

4

1

0

0

0

5(6.5)

Resistant to OFX

86

2

13

27

23

11

2

6

2

0

0

0

8(9.3)

Resistant to KM

30

2

7

7

9

2

1

1

0

0

0

0

1(3.3)

Resistant to SM and (or) EMB

82

4

8

35

18

13

3

1

0

0

0

0

1(1.2)

Resistant to KM and (or) OFX

13

1

3

3

4

1

0

1

0

0

0

0

1(7.7)

Resistant to any first and second line drugs

79

1

11

26

21

10

3

5

2

0

0

0

7(8.9)