Neem (Azadirachta indica A. Juss) Oil to Tackle Enteropathogenic Escherichia coli

Table 4

Antibacterial activity of neem oil (NO) against forty-eight Escherichia coli isolates revealed as growth inhibition zone (mm).

E. coli isolates	Growth inhibition zone (mm)^*
	NSO (100 µL )	TWN (100 µL)	WTR (100 µL)	CFX (100 µL)
(1) FLC 1056	11.33 ± 0.58 b	—	—	30.41 ± 0.20 a
(2) FLC 1247	16.13 ± 1.15 b	—	—	30.52 ± 1.07 a
(3) FLC 1059	15.83 ± 1.13 b	—	—	29.62 ± 1.00 a
(4) FLC 1243	19.00 ± 1.00 b	—	—	31.53 ± 0.67 a
(5) FLC 1048	12.33 ± 0.58 b	—	—	29.42 ± 0.58 a
(6) FLC 1167	9.50 ± 0.70 b	—	—	30.61 ± 1.21 a
(7) FLC 1249	13.33 ± 0.58 b	—	—	29.61 ± 1.11 a
(8) FLC 1055	14.53 ± 1.25 b	—	—	31.75 ± 0.82 a
(9) FLC 1054	16.23 ± 1.18 b	—	—	31.41 ± 0.76 a
(10) FLC 1085	18.00 ± 1.00 b	—	—	30.53 ± 1.17 a
(11) FLC 1244	15.33 ± 0.48 b	—	—	28.86 ± 1.00 a
(12) FLC 1165	19.50 ± 0.70 b	—	—	31.33 ± 0.67 a
(13) FLC 1086	11.33 ± 0.58 b	—	—	29.82 ± 0.48 a
(14) FLC 1053	14.53 ± 1.15 b	—	—	32.65 ± 1.39 a
(15) FLC 1095	16.83 ± 1.18 b	—	—	29.05 ± 1.22 a
(16) FLC 1219	10.70 ± 1.00 b	—	—	32.75 ± 0.55 a
(17) FLC 1235	13.23 ± 0.88 b	—	—	30.15 ± 0.55 a
(18) DSM8696	13.50 ± 0.50 b	—	—	26.21 ± 1.00 a
(19) DSM9025	13.33 ± 0.58 b	—	—	21.64 ± 0.94 a
(20) DSM10973	13.53 ± 1.25 b	—	—	29.14 ± 1.75 a
(21) ATCC33559	13.83 ± 1.18 b	—	—	32.12 ± 1.09 a
(22) CVVI E210	13.00 ± 1.00 a	—	—	25.83 ± 1.65 a
(23) CVVI E173	12.23 ± 0.58 b	—	—	32.35 ± 1.49 a
(24) CVVI E12b	27.50 ± 0.50 b	—	—	11.25 ± 0.68 a
(25) CVVI E16	14.33 ± 0.88 b	—	—	27.54 ± 1.45 a
(26) CVVI E320	21.53 ± 1.35 b	—	—	28.75 ± 1.86 a
(27) CVVI E130	11.83 ± 1.78 b	—	—	29.64 ± 0.87 a
(28) CVVI E48	10.00 ± 1.40 a	—	—	29.31 ± 0.27 a
(29) CVVI KH10	26.33 ± 0.53 b	—	—	15.34 ± 0.66 a
(30) CVVI K10B	27.50 ± 0.56 b	—	—	0
(31) CVVI E298	11.33 ± 0.48 b	—	—	23.90 ± 1.69 a
(32) CVVI E273	13.53 ± 1.75 b	—	—	29.59 ± 1.77 b
(33) CVVI K436	13.14 ± 1.68 b	—	—	30.21 ± 1.38 a
(34) CVVI E98	11.00 ± 1.00 a	—	—	26.91 ± 1.56 a
(35) CVVI E77	14.33 ± 0.58 b	—	—	23.93 ± 0.59 a
(36) CVVI E148	13.50 ± 0.50 b	—	—	28.71 ± 0.87 a
(37) CVVI E10	24.33 ± 0.58 b	—	—	10.35 ± 1.11 a
(38) CVVI E215	16.53 ± 1.15 b	—	—	26.41 ± 1.40 a
(39) NLK99/F5	29.83 ± 1.18 b	—	—	16, 21 ± 0.89 a
(40) NLP987/F5	30.00 ± 1.00 a	—	—	13.21 ± 1.15 a
(41) NLK99-1^*	21.73 ± 1.35 b	—	—	15.34 ± 1.37 a
(42) NLK99-3^*	28.33 ± 1.50 b	—	—	0
(43) NLK99-5^*	25.00 ± 1.10 a	—	—	9.54 ± 1.11 a
(44) NLK99-7^*	26.33 ± 0.58 b	—	—	14,25 ± 1.11 a
(45) NLK99-9^*	27.50 ± 0.50 b	—	—	11.26 ± 1.78 a
(46) NLK99-11^*	29.53 ± 1.25 b	—	—	16.24 ± 1.68 a
(47) NLK99-15^*	28.83 ± 1.38 b	—	—	16.35 ± 1.11 a
(48) NLK99-19^*	25.00 ± 1.70 a	—	—	15.53 ± 0.84 a

Three paper discs per plate and three plates for each bacterium were considered. The experiment was repeated twice. Values are given as mean ± S.D. Values in a row followed by different lowercased letters are significantly different at .