Table 1.

Susceptibility pattern of Escherichia coli

Antibiotics	Test done (td)	Resistant	95% CI resistant	Sensitive	95% CI sensitive	Test not done (nd)
		N (%)		N (%)
Penicillin	2	2 (100)	34.2–100	0 (0)	0	94
Ampicillin	78	69 (88.46)	79.50–93.81	9 (11.54)	6.19–20.50	51
Augmentin	33	14 (42.42)	27.24–59.19	19 (57.58)	40.81–72.76	95
Carbenicillin	0	0	0	0	0	115
Aztreonam	22	3 (13.64)	4.75–33.33	19 (86.36)	66.67–95.25	92
Imipenem	82	1 (1.22)	0.22–6.59	81 (98.78)	93.41–99.78	48
Meropenem	18	0 (0)	0	18 (100 )	82.41–100	96
Piperacillin	1	0 (0)	0	1 (100)	20.65–100	128
Tazocin (Zosyn)	38	4 (10.53)	4.17–24.13	34 (89.47)	75.87–95.83	90
Cephalexin	44	42 (95.45)	84.87–98.74	2 (4.55)	1.26–15.13	84
Cefoxitin	22	16 (72.73)	51.85–86.85	6 (27.27)	13.15–48.15	125
Cefuroxime	23	7 (30.43)	15.60–50.87	16 (69.57)	49.13–84.40	56
Ceftriaxone	39	18 (46.15)	31.57–61.43	21 (53.85)	38.57–68.43	57
Ceftazidime	13	0 (0)		13 (100.0)	77.19–100	115
Cefepime	26	8 (30.77)	16.50–49.99	18 (69.23)	50.01–83.50	102
Amikacin	81	3 (3.70)	1.27–10.33	78(96.30)	89.67–98.73	49
Gentamicin	29	4 (13.79)	5.50–30.56	25 (86.21)	69.44–94.50	99
Ciprofloxacin	61	30 (49.18)	37.06–61.40	31(50.82)	38.60–62.94	67
Levofloxacin	1	0 (0)	0	1(100.00)	20.65–100.0	45
Norfloxacin	53	28 (52.83)	39.66–65.62	25 (47.17)	34.38–60.34	66
Erythromycin	1	1 (100.00)	20.65–100	0 (0)	0	128
Clindamycin	1	1 (100.00)	20.65–100	0 (0)	0	128
Vancomycin	1	0 (0)	0	1 (100.00)	20.65–100.00	128
Linezolid	1	0 (0)	0	1 (100.00)	20.65–100.00	128
Tigecycline	4	0 (0)	0	4 (100.00)	51.01–100	125
Colistin	3	0 (0)	0	3 (100.00)	43.85–100	126
Nitrofurantoin	112	11 (9.82)	5.57–16.73	101 (90.18)	83.72-94.43	17
TMP-SMX	107	61 (57.01)	47.55–65.99	46 (42.99)	34.01–52.45	22

N = frequency, CI = confidence interval, TMP-SMX = Trimethoprim and sulfamethoxazole, td = respective antibiotic tested against E. coli, nd = respective antibiotic was not tested against E. coli