The antibacterial effect of solvent extracts and enzymatic hydrolysis from Dreissena polymorpha and Dreissena polymorpha

The aim of this study was to investigate the bioactivity of extract and enzyme hydrolysate extracted from Anodonta cygnea and Dreissena polymorpha. The powdered samples of soft parts of bivalves were used for the preparation of methanol, ethanol, chloroform extracts as well as enzyme hydrolysis. The antibacterial effects of these extracts were evaluated against gram negative Proteus vulgaris, Klebsiella pneumoniae and gram positive Enterococcus faecalis using disc diffusion method and measuring the growth inhibition zone. In addition, the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) of the studied extracts were determined. Regarding the growth inhibition zone, the extracts and enzymatic hydrolysis of D. polymorpha showed greater antibacterial activity against P. vulgaris and K. pneumoniae compared to A. cygnea whereas A. cygnea was more efficient against E. faecalis. In conclusion, extracts and enzymatic hydrolysis of A. cygnea and D. polymorpha can be used as a valuable source with bioactive potential for producing antibacterial drugs.