Table-3.

Susceptibility and resistance rates to antibiotics of avian pathogenic Escherichia coli isolates.

Antibiotic	Number of isolates	Frequency and percentage of susceptibility (%)	Frequency and percentage of intermediate (%)	Frequency and percentage of resistance (%)	p-value
AMX	36	5 (13.8)	1 (2.8)	30 (83.3)	3.901×10−14***
AMP	36	5 (13.8)	1 (2.8)	30 (83.3)	3.901×10−14***
AMC	36	10 (27.7)	20 (55.6)	6 (16.7)	0.001503***
TIC	36	6 (16.7)	1 (2.8)	29 (80.5)	5.23110−13***
IPM	36	38 (100)	0	0	<2.2×10−16***
ATM	35	20 (57.1)	2 (5.8)	13 (37.1)	527×10−5***
CZ	34	9 (26.5)	5 (14.7)	20 (58.8)	0.0003404***
FOX	35	27 (77.1)	7 (20)	1 (2.9)	4.481×10−11***
CTX	36	21 (58.3)	2 (5.6)	13 (36.1)	1.148×10−5***
CAZ	30	15 (50)	2 (6.7)	13 (43.3)	0.0006426***
CFM	35	20 (57.1)	1 (2.9)	14 (40)	5.403×10−6***
CPO	19	16 (84.2)	1 (5.3)	2 (10.5)	5.829×10−8***
K	35	18 (51.4)	2 (5.8)	15 (42.8)	9.142×10−5***
GEN	36	34 (94.4)	1 (2.8)	1 (2.8)	<2.2×10−16***
TE	35	15 (42,9)	0	20 (57.1)	8.931×10−7***
CL	35	35 (100)	0	0	<2.2×10−16***
SXT	36	11 (30.6)	1 (2.8)	24 (66.6)	6.024×10−8***
NA	36	5 (13.8)	1 (2.8)	30 (83.4)	3.901×10−14***
PA	36	4 (11.2)	5 (13.8)	27 (75)	6.692×10−10***
CIP	35	14 (40)	0	21 (60)	4.129×10−7***
OFX	36	12 (33.4)	1 (2.8)	23 (63.8)	2.7×10−7***
PF	35	15 (42.9)	1 (2.8)	19 (54.3)	1.028×10−5***

The proportion comparison χ² test performed for a value of α=5%;

^***Very highly significant value. AMX=Amoxicillin, AMP=Ampicillin, AMC=Amoxicillin+clavulanic acid, TIC=Ticarcillin, IPM=Imipenem, ATM=Aztreonam, CZ=Céfazolin, FOX=Cefoxitin, CTX=Cefotaxime, CAZ=Ceftazidime, CFM=Cefixime, CPO=Cefpirome, K=Kanamycin, GEN=Gentamicin, TE=Tetracycline, CL=Colistin, SXT=Triméthoprim+sulfamethoxazole, NA=Nalidixic acid, PA=Pipemidic acid, CIP=Ciprofloxacin, OFX=Ofloxacin, PF=Pefloxacin