Probiotic Potential of Lactobacillus Strains with Antimicrobial Activity against Some Human Pathogenic Strains

Table 8

Inhibitory activity of treated and untreated supernatants of Lactobacillus strains against E. coli (ATCC 29181) as indicator strain.

Lactobacillus strain	Diameter of inhibition zone (mm) including 7 mm well diameter^1
	Untreated supernatant (control)	Neutralized supernatant (pH 6.5)	Supernatant + pronase (1 mg/mL)	Supernatant + trypsin (1 mg/mL)	Supernatant + catalase (0.5 mg/mL)
L. casei Shirota*	16.9±0.8	—	17.9±0.6	17.1±0.0	15.9±0.2
L. acidophilus HM1	15.1±0.9	—	14.5±2.1	15.3±0.9	14.8±0.2
L. fermentum HM2	16.4±1.4	—	15.7±1.4	15.0±0.5	17.0±1.9
L. fermentum HM3	15.7±1.0	—	15.5±0.7	15.8±2.1	15.5±1.6
L. buchneri FG1	16.3±1.0	—	16.8±0.2	15.2±0.7	16.5±1.2
L. buchneri FD1	15.5±0.4	—	16.0±0.5	15.8±0.7	15.2±0.2
L. buchneri FD2	15.9±0.8	—	17.2±1.2	15.3±0.9	15.3±1.4
L. casei BF1	18.1±1.2	—	17.8±0.2	19.3±0.5	17.7±0.5
L. casei BF2	18.2±0.7	—	18.0±0.9	18.8±0.7	17.8±0.2
L. casei BF3	17.9±0.9	—	18.5±0.2	17.7±0.5	17.8±0.7

𝟏Values are means ± SD of two independent experiments, each in triplicate.
— No inhibition.
*Reference strain.