Table 3: Characterization and comparison of the gram-negative bacteria and antibiotics.

Antibiotics

Results

N

%

P-value*

Ampicillin

Resistant

28

93,33

< 0,001

 

Sensitive

2

6,67

 

Ampicillin/Sulbactam

Resistant

23

76,67

0,005

 

Sensitive

7

23,33

 

Amikacin

Resistant

9

19,57

< 0,001

 

Sensitive

37

80,43

 

Amoxicillin/Clavulanic acid

Resistant

22

68,75

0,051

 

Sensitive

10

31,25

 

Aztreonam

Resistant

34

87,18

< 0,001

 

Sensitive

5

12,82

 

Cefazolin

Resistant

7

70,00

0,344

 

Sensitive

3

30,00

 

Cefotaxime

Resistant

15

88,24

0,002

 

Sensitive

2

11,76

 

Cefoxitin

Resistant

16

48,48

0,999

 

Sensitive

17

51,52

 

Cefuroxime

Resistant

15

93,75

0,001

 

Sensitive

1

6,25

 

Ceftazidime

Resistant

39

78,00

< 0,001

 

Sensitive

11

22,00

 

Cefepime

Resistant

37

75,51

< 0,001

 

Sensitive

12

24,49

 

Ceftriaxone

Resistant

11

68,75

0,210

 

Sensitive

5

31,25

 

Ciprofloxacin

Resistant

32

65,31

0,044

 

Sensitive

17

34,69

 

Colistin

Resistant

6

54,55

0,999

 

Sensitive

5

45,45

 

Ertapenem

Resistant

12

30,77

0,024

 

Sensitive

27

69,23

 

Fosfomycin

Resistant

6

100,00

0,031

 

Sensitive

0

0,00

 

Gentamicin

Resistant

24

48,98

0,999

 

Sensitive

25

51,02

 

Imipenem

Resistant

14

32,56

0,032

 

Sensitive

29

67,44

 

Levofloxacin

Resistant

24

68,57

0,041

 

Sensitive

11

31,43

 

Meropenem

Resistant

14

28,00

0,003

 

Sensitive

36

72,00

 

Piperacillin/tazobactam

Resistant

21

45,65

0,659

 

Sensitive

25

54,35

 

Polymyxin B

Resistant

2

16,67

0,039

 

Sensitive

10

83,33

 

Trimethoprim/sulfamethoxazole

Resistant

24

72,73

0,014

 

Sensitive

9

27,27

 

Sulfazotrim

Resistant

7

43,75

0,804

 

Sensitive

9

56,25

 

Tetracycline

Resistant

7

100,00

0,016

 

Sensitive

0

0,00

 

Tobramycin

Resistant

17

51,52

0,999

 

Sensitive

16

48,48

 

Tigecycline 

Resistant

7

53,85

0,999

 

Sensitive

6

46,15

 

Ticarcillin/clavulanic acid

Resistant

5

62,50

0,727

 

Sensitive

3

37,50

 

(*) Binomial test (statistically significant if p < 0,05).