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Table 1 AMR profiles of Aeromonas isolates

From: Motile aeromonads from farmed and wild freshwater fish in northern Italy: an evaluation of antimicrobial activity and multidrug resistance during 2013 and 2016

Antimicrobials

No. of resistant isolates (%)

Chi-square index (χ2)

A. hydrophila

A. sobria

A. caviae

Total

Cloxacillin

53 (100)

31 (100)

11 (100)

95 (100)

/

Spiramycin

53 (100)

31 (100)

11 (100)

95 (100)

/

Tilmicosin

53 (100)

31 (100)

11 (100)

95 (100)

/

Ampicillin*

53 (100)

31 (100)

10 (90.9)

94 (98.9)

7.72

Tylosin

53 (100)

30 (96.8)

11 (100)

94 (98.9)

2.09

Penicillin

52 (98.1)

30 (96.8)

11 (100)

93 (97.9)

0.44

Sulfadiazine*

53 (100)

28 (90.3)

11 (100)

92 (96.8)

6.40

Amoxicillin

52 (98.1)

30 (96.8)

10 (90.9)

92 (96.8)

1.55

Tiamulin**

48 (90.6)

22 (71.0)

11 (100)

81 (85.3)

8.13

Neomycin**

27 (50.9)

26 (83.9)

4 (36.4)

57 (60.0)

11.73

Erythromycin***

35 (66.0)

9 (29.0)

11 (100)

55 (57.9)

20.04

Cephaloridine***

38 (71.7)

3 (9.7)

10 (90.9)

51 (53.7)

37.19

AMC

27 (50.9)

11 (35.5)

5 (45.5)

43 (45.3)

1.89

Apramycin***

16 (30.2)

23 (74.2)

0

39 (41.1)

24.32

Tetracycline**

12 (22.6)

1 (3.2)

5 (45.5)

18 (8.9)

10.49

SXT**

14 (26.4)

0

2 (18.2)

16 (16.8)

9.76

Nalidixic acid*

12 (22.6)

0

3 (27.3)

15 (15.8)

8.77

Thiamphenicol*

11 (20.8)

0

2 (18.2)

13 (13.7)

7.35

Kanamycin

5 (9.4)

6 (19.4)

0

11 (11.6)

3.51

Danofloxacin

7 (13.2)

0

2 (18.2)

9 (9.5)

5.08

Enrofloxacin***

4 (7.5)

0

4 (36.4)

8 (8.4)

14.04

Flumequine

5 (9.4)

0

2 (18.2)

7 (7.4)

4.68

Ceftiofur***

1 (1.9)

1 (3.2)

4 (36.4)

6 (6.3)

19.04

Aminosidine*

1 (1.9)

5 (16.1)

0

6 (6.3)

7.54

Colistin

4 (7.5)

2 (6.5)

0

6 (6.3)

0.88

Doxycycline**

2 (3.8)

0

3 (27.3)

5 (5.3)

12.64

Gentamicin

3 (5.7)

0

0

3 (3.2)

2.45

Marbocyl

3 (5.7)

0

0

3 (3.2)

2.45

Florfenicol

2 (3.8)

0

1 (9.1)

3 (3.2)

2.34

Cefquinome

0

0

0

0

/

  1. Significant differences between Aeromonas complexes were indicated by: * P < 0.05, ** P < 0.01, *** P < 0.001