Table 2. Antibacterial activity of plant extracts on microorganisms

Sample Listeria grayi Escherichia coli
Hot water Enzyme Hot water Enzyme
Castanea crenata var. dulcis
Terminalia chebula
Schinopsis lorentzii ++
Acacia decurrens var. mollis
Treatment concentration of sample : 1 mg
- : No effect
+ : clear zone diameter < 5 mm
++: clear zone diameter > 5 mm