Table 2. Antibacterial activity of Lactobacillus plantarum DW3 and the commercial probiotic Lactobacillus casei R after 18 hrs of incubation under varying conditions.



Pathogens

Production of acids and H2O2

Limitation of only H2O2

Limitation of acids and H2O2 production

DW3

R

DW3

R

DW3

R

 Staphylococcus aureus ATCC 25923

+++

+

+++

++

+

-

 Bacillus cereus ATCC 1778

+++

+

+++

+

+

+

 Shigella sonnei PSSCMI 0032

+++

++

++

+

+

-

 Shigella flexneri PSSCMI 0035 

+++

+

+++

++

+

+

 Salmonella Typhimurium PSSCMI 0035

++

+

+

+

+

-

 Salmonella Typhi PSSCMI 0034

+++

++

+++

+

+

+

 Escherichia coli ATCC 25922

+++

+

++

+

+

-

 Escherichia coli O157: H7

++

+

+

+

+

-

 Vibrio parahaemolyticus VP 4

+++

++

+++

+

+

+

 Proteus vulgaris PSSCMI 0041

+++

++

+++

+++

+

+

 Proteus rettgeri PSSCMI 0044

++

+

+++

+

+

+

 Enterobacter cloacae PSSCMI 0040

++

-

++

+

+

-

 Enterobacter aerogenes PSSCMI 0039

++

+

++

+

+

+

Three replicates were conducted in this study and the inhibition was graded by inhibition zone using the following scales; +++ = very strong (≥ 10 mm), ++ = strong (7-9 mm), + = moderate (< 7 mm), - = poor (no inhibition zone).


Supported by UNESCO / MIRCEN network