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Table 5 MIC of levofloxacin resistant strains and the mutation of gyrA and gyrB genes

From: Emerging Helicobacter pylori levofloxacin resistance and novel genetic mutation in Nepal

No

Strains

MIC (mg/L)

gyrA

gyrB

1

2

>32

N87K

None

2

5

>32

D91G

None

3

8

>32

D91N

None

4

16

>32

S63P, D91N

None

5

18

>32

D91N

None

6

29

>32

S63P, N87K, P188S

None

7

38

>32

D99V

None

8

49

>32

N87K, D91N, V172I

None

9

55

>32

N87I

E483K

10

70

>32

None

None

11

86

>32

N87K

None

12

89

>32

D91N, R130K

None

13

90

>32

N87K

None

14

120

8

A88P

None

15

123

>32

D91Y

None

16

140

>32

D91N

None

17

141

>32

D91N

None

18

142

>32

S63P, R130K

None

  1. N87K means amino acid substituted at Asn-87; None means no specific mutation