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| 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 |
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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). |
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