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Table 3 Detection of efflux pump resistance to tetracycline in E. coli

From: Characterization of genes related to the efflux pump and porin in multidrug-resistant Escherichia coli strains isolated from patients with COVID-19 after secondary infection

Stain no

MIC of tetracycline alone (µg/mL)

MIC of tetracycline in the presence of CCCP (µg/mL)

Fold reduction

1

32

2

4

2

125

32

2

3

16

0.5

5

4

2

1

1

5

64

16

2

6

64

16

2

7

8

0.5

4

8

8

2

2

9

64

2

5

10

64

64

0

11

32

16

3

12

8

4

8

13

1

0.5

2

14

4

0.5

3

15

64

1

6

16

125

32

2

17

125

32

2

18

16

2

3

19

125

0.5

8

20

125

8

4

21

32

32

0

22

32

1

5

23

125

32

2

24

64

4

4

25

32

8

2

26

125

64

1

27

32

4

3

28

64

8

3

29

64

16

2

30

8

8

0

31

32

1

6

32

125

16

3

33

4

1

2

34

1

0.025

2

35

4

0.5

3

36

8

8

0

37

32

8

2

38

64

32

1

39

32

32

0

40

64

0.025

8

41

2

0.25

3

42

64

1

6

43

125

0.5

8

44

4

0.25

4

45

64

4

4

46

125

64

1

47

64

4

4

48

32

4

3

49

125

1

7

50

2

0.5

3