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Table 1 Antibacterial assay of kombucha fermented by the kombucha layer supplemented with Lactobacillus spp. ( lac1 lac5 )

From: Lactic acid bacteria: promising supplements for enhancing the biological activities of kombucha

Diameter of the Halo zone (mm)

 

E.c

B.c

S.t

L.m

U.tea

0

0

0

0

O.cul

5.50 ± 0.7

1.75 ± 1.0

7.05 ± 0.6

3.75 ± 0.3

Lac1

6.75 ± 1.0

3.50 ± 0.7

7.50 ± 0.7

7.00 ± 0.7

Lac2

4.50 ± 0.7

4.50 ± 1.4

3.00 ± 2.8

5.75 ± 0.7

Lac3

8.50 ± 0.7

6.75 ± 1.0

9.15 ± 0.5

9.00 ± 0.7

Lac4

2.00 ± 1.4

6.25 ± 0.3

5.75 ± 0.3

7.50 ± 0.7

Lac5

6.50 ± 0.7

3.25 ± 0.3

6.75 ± 0.3

6.00 ± 1.4

  1. U.tea: unfermented sweetened black tea; O.cul: original culture from the fermentation of sweetened black tea only (kombucha layer). L.m: Listeria monocytogenes ATCC 19111, E.c: Escherichia coli ATCC 8739, S.t: Salmonella typhimurium ATCC 14028, B.c: Bacillus cereus ATCC 11778.