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Table 1 Antibiotic resistance phenotypes of R. anatipestifer strains collected between 2013 and 2018

From: Prevalence of fluoroquinolone resistance and mutations in the gyrA, parC and parE genes of Riemerella anatipestifer isolated from ducks in China

Years

Antibiotics

MICs (μg/mL) and proportion of strains (%)

0.5

2

4

8

16

32

64

128

256

512

1024

2013 n = 13

NA

        

7.69

61.5

30.8

CIP

7.69

   

7.69

84.6

     

ENR

7.69

   

7.69

7.69

53.8

23.1

   

OFX

 

7.69

   

46.2

23.1

23.1

   

2014~2015 n = 6

NA

        

16.7

83.3

 

CIP

  

16.7

 

16.7

50

16.7

    

ENR

  

16.7

  

16.7

50

16.7

   

OFX

  

16.7

 

16.7

33.3

16.7

16.7

   

2016 n = 18

NA

        

11.1

77.8

11.1

CIP

   

5.6

55.6

38.9

     

ENR

   

5.6

22.2

27.8

33.3

11.1

   

OFX

   

11.1

44.4

44.4

     

2017 n = 60

NA

        

10

42

8

CIP

 

3.3

5.0

1.7

21.7

61.7

6.7

    

ENR

  

8.3

1.7

8.3

28.3

36.7

16.7

   

OFX

 

3.3

5.0

11.7

28.3

20

18.3

13.3

   

2018 n = 40

NA

        

17.5

57.5

25

CIP

   

7.5

35

35

22.5

    

ENR

   

2.5

50

10

12.5

25

   

OFX

   

2.5

47.5

12.5

22.5

15

   
  1. aNA nalidixic acid; CIP ciprofloxacin; ENR enrofloxacin; OFX ofloxacin