Table 2.

Evaluation of the growth inhibition of Gram-positive and Gram-negative microorganisms by L. plantarum isolates using the well direct diffusion assay.

Code of L. plantarum isolates	Inhibition zone diameters against indicator strains (mm)a					pH of supernatantb
	S. aureus	E. faecalis	E. coli	Sh. flexneri	S. typhi
L1	44 ± 0.03	39 ± 1.7	35 ± 0.07	30 ± 1.1	28 ± 0.66	4.5
L2	37 ± 0.4	34 ± 0.54	33 ± 0.55	29 ± 1.09	27 ± 0.76	4.5
L3	34 ± 0.96	35 ± 0.45	33 ± 0.34	28 ± 0.55	25 ± 0.76	4.6
L4	40 ± 0.5	38 ± 0.22	37 ± 0.43	30 ± 0.06	28 ± 0.66	4.5
L5	36 ± 0.66	32 ± 1.65	34 ± 1.02	29 ± 0.75	26 ± 0.98	4.3
L6	30 ± 0.45	30 ± 0.098	30 ± 1.02	26 ± 0.43	25 ± 0.65	4.5
L7	30 ± 0.55	30 ± 0.044	32 ± 2.33	26 ± 0.43	22 ± 0.43	4.2
L8	26 ± 1.06	30 ± 0.43	30 ± 0.98	26 ± 0.34	24 ± 0.76	4.5
L9	26 ± 0.89	29 ± 0.23	31 ± 0.98	19 ± 0.75	20 ± 0.75	4.6
L10	32 ± 0.76	27 ± 0.15	32 ± 0.77	26 ± 1.98	23 ± 0.86	4.2
L11	30 ± 0.32	21 ± 0.033	25 ± 1.23	16 ± 0.54	22 ± 1.76	4.2
L12	18 ± 0.33	20 ± 0.78	16 ± 0.9	17 ± 0.64	15 ± 1.44	4.3
L13	19 ± 0.09	24 ± 1.87	16 ± 0.8	15 ± 1.07	14 ± 0.54	4.3
L14	29 ± 0.061	24 ± 1.43	24 ± 0.63	14 ± 0.043	22 ± 0.54	4.5
L15	29 ± 0.33	22 ± 0.99	27 ± 0.04	15 ± 0.03	21 ± 0.88	4.3
L. casei	19 ± 0.011	17 ± 0.12	15 ± 0.32	12 ± 0.012	11 ± 0.011	4.5
ATCC 20011

^aMean of the diameter and standard deviation. Data are representative of three trials.

^bpH of lactobacillus supernatant after 24 h of incubation (pH of MRS broth before culture was 6.5 ± 2).