The isolated colony formed on the MRS agar (Difco, USA) plates was identified using gram stain, biochemical tests, scanning electron microscopy and automated system for rapid identification of bacteria (BioLog identification system).
The identification was performed according to Bergey's manual of determinative of
bacteriology [14].
The culture was kept in MRS agar slant and stored at 4 °C.
For long term storage, one loop of bacteria was mixed in Microbank (a sterile vial containing porous beads kept in glycerol as cryopreservative and serves as carriers to support microorganisms) and stored at -20 °C.