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. 2021 Nov 16;10(11):1402. doi: 10.3390/antibiotics10111402

Table 4.

Statistical analysis on the percentages of antibiotic resistance of 105 Gram-negative isolates.

Antibiotic Category Antibiotic AcB CiF EnA EnC EsC KlO KlP PrM PsA SeM p-Value (Test)
% % % % % % % % % %
(#) (#) (#) (#) (#) (#) (#) (#) (#) (#)
Amoxicillin clavulanic acid / 100
(2/2)
100
(1/1)
100
(3/3)
36.8
(7/19)
100
(2/2)
80.4
(37/46)
100
(1/1)
/ 100
(2/2)
p = 0.0135 * (C)
EsC ***, p = 0.0013 (Z)
Penicillin Ampicillin 100
(5/5)
/ / / 100
(6/6)
/ 92.9
(13/14)
/ 100
(1/1)
/ p = 0.83 (C)
Piperacillin tazobactam 100
(1/1)
50
(1/2)
66.7
(2/3)
0.0
(0/3)
20
(4/20)
100
(2/2)
80.4
(37/46)
0.0
(0/1)
60
(3/5)
0.0
(0/2)
p = 0.0002 * (C)
EnC ***, p = 0.0091 (Z)
EsC ***, p = 0.001 (Z)
PrM ***, p = 0.0279 (Z)
SeM ***, p = 0.0173 (Z)
Cephalosporin second generation Cefoxitin 100
(7/7)
100
(2/2)
/ 100
(1/1)
18.2
(2/11)
100
(1/1)
53.3
(16/30)
/ 100
(1/1)
0.0
(0/1)
p = 0.0166 * (C)
EsC ***, p = 0.0125 (Z)
SeM ***, p = 0.0353 (Z)
Cephalosporin third generation Ceftazidime / 50
(1/2)
66.7
(2/3)
33.3
(1/3)
35
(7/20)
50
(1/2)
83.3
(40/48)
100
(1/1)
50
(2/4)
0.0
(0/2)
p = 0.0064 * (C)
EsC ***, p = 0.0084 (Z)
SeM ***, p = 0.0087 (Z)
Cefotaxime 100
(9/9)
50
(1/2)
66.7
(2/3)
66.7
(2/3)
55
(11/20)
100
(2/2)
83.3
(40/48)
100
(1/1)
100
(2/2)
0.0
(0/2)
p = 0.0343 * (C)
EsC ***, p = 0.0287 (Z)
SeM ***, p = 0.0009 (Z)
Cephalosporin fourth generation Cefepime / 50
(1/2)
66.7
(2/3)
0.0
(0/3)
10
(2/20)
50
(1/2)
76.6
(36/47)
0.0
(0/1)
40
(2/5)
0.0
(0/2)
p < 0.0001* (C)
KlP **, p = 0.0292 (Z)
EnC ***, p = 0.0198 (Z)
EsC ***, p = 0.0005 (Z)
PrM ***, p = 0.0429 (Z)
SeM ***, p = 0.0318 (Z)
Fluoroquinolone class Ciprofloxacin 89.5
(17/19)
0.0
(0/2)
33.3
(1/3)
0.0
(0/3)
60
(12/20)
100
(1/1)
83.3
(40/48)
0.0
(0/1)
50
(2/4)
0.0
(0/2)
p = 0.0003* (C)
CiF ***, p = 0.0031 (Z)
EnA ***, p = 0.0417 (Z)
EnC ***, p = 0.001 (Z)
PrM ***, p = 0.0081 (Z)
SeM ***, p = 0.0031 (Z)
Aminoglycoside Fosfomycin 100
(8/8)
0.0
(0/1)
66.7
(2/3)
0.0
(0/3)
10
(2/20)
50
(1/2)
46.8
(22/47)
100
(1/1)
100
(2/2)
0.0
(0/2)
p = 0.0006* (C)
AcB **, p = 0.0054 (Z)
EnC ***, p = 0.041 (Z)
EsC ***, p = 0.0051 (Z)
Amikacin 83.3
(10/12)
0.0
(0/2)
33.3
(1/3)
0.0
(0/3)
0.0
(0/20)
50
(1/2)
60.4
(29/48)
0.0
(0/1)
50
(2/4)
0.0
(0/2)
p < 0.0001 * (C)
AcB **, p = 0.023 (Z)
EnC ***, p = 0.0363 (Z)
EsC ***, p = 0.0002 (Z)
Gentamicin 88.9
(16/18)
50
(1/2)
0.0
(0/2)
0.0
(0/3)
20
(4/20)
50
(1/2)
70.8
(34/48)
0.0
(0/1)
50
(2/4)
0.0
(0/2)
p = 0.0001* (C)
AcB **, p = 0.023 (Z)
EnA ***, p = 0.0206 (Z)
EnC ***, p = 0.0113 (Z)
EsC ***, p = 0.0014 (Z)
PrM ***, p = 0.0318 (Z)
SeM ***, p = 0.0206 (Z)
Carbapenems Imipenem 80
(8/10)
0.0
(0/1)
50
(1/2)
0.0
(0/1)
0.0
(0/12)
/ 68.4
(13/19)
/ 100
(1/1)
0.0
(0/1)
p = 0.0024 * (C)
EsC ***, p = 0.0015 (Z)
Meropenem 83.3
(15/18)
50
(1/2)
66.7
(2/3)
0.0
(0/3)
0.0
(0/20)
50
(1/2)
70.8
(34/48)
0.0
(0/1)
25
(1/4)
0.0
(0/2)
p < 0.0001* (C)
AcB **, p = 0.0299 (Z)
EnC ***, p = 0.0182 (Z)
EsC ***, p < 0.0001 (Z)
PrM ***, p = 0.0413 (Z)
SeM ***, p = 0.0299 (Z)
Ertapenem 100
(7/7)
0.0
(0/1)
50
(1/2)
0.0
(0/3)
5
(1/20)
100
(2/2)
66.7
(22/33)
100
(1/1)
100
(1/1)
0.0
(0/2)
p < 0.0001* (C)
AcB **, p = 0.0261 (Z)
EnC ***, p = 0.0268 (Z)
EsC ***, p = 0.0005 (Z)
SeM ***, p = 0.040 (Z)
Folate pathway inhibitors Trimethoprim-sulfamethoxazole 88.2
(15/17)
50
(1/2)
50
(1/2)
0.0
(0/2)
35
(7/20)
0.0
(0/2)
23.4
(11/47)
0.0
(0/1)
100
(2/2)
0.0
(0/2)
p = 0.0004* (C)
AcB **, p = 0.0003 (Z)
Glycylcycline class Tigecycline 0.0
(0/2)
0.0
(0/2)
/ 0.0
(0/1)
5.6
(1/18)
0.0
(0/2)
12.8
(5/39)
100
(1/1)
100
(2/2)
/ p = 0.0032* (C)
PsA **, p = 0.0119 (Z)
Polymyxin class Colistin 6.7
(1/15)
0.0
(0/2)
0.0
(0/1)
0.0
(0/2)
5.6
(1/18)
0.0
(0/2)
15.9
(7/44)
100
(1/1)
20
(1/5)
100
(2/2)
p = 0.0109* (C)
SeM **, p = 0.0145 (Z)

AcB = A. baumannii; CiF = C. freundii; EnA = E. aerogenes; EnC = E. cloacae; EsC = E. coli; KlO = K. oxytoca; KlP = k. pneumoniae; PrM = P. mirabilis; PsA = P. aeruginosa; SeM = S. marcescens; * = significant test; ** = most frequent resistant bacteria; *** less frequent resistant bacteria; C = multicomparison chi-squared test; Z = post-hoc Z-test.