Abstract:
Polysaccharides represent a class of high-value polymers with many industrial
application in food, cosmetic, textile and pharmaceutical industries due to their
properties. The objective of this study is to determine the effect of exopolysaccharide
from B.subtilis, B.coagulans and B.licheniformis on pathogenic bacteria. Polysaccharides
isolation was isolated by using ethanol method. The exopolysaccharide obtained was test
against to ten strains of pathogenic bacteria. Antibacterial activity was determined using
disks diffusion and drop test method. Antibacterial test showed that none of the
polysaccharides have antibacterial activity. In contrast the exopolysaccharides was found
to increase the growth of the tested bacteria. Exopolysaccharides from the Bacillus strains
used doesn't effect on the bacteria. However, in the last forty years, new polysaccharides
from cultivable microbial sources have received mcrease attention. Thus,
exopolysaccharides have been produced by different bacteria on a commercial scale.
