design: Bacterial isolates were identified by partial sequencing of 16S rRNA gene fragments amplified using PCR (Polymerase Chain Reaction). Total DNA was prepared using a method modified from Sambrook & Russell (2001) and Ausubel et al. (2002). Oligonucleotide primers (Forward primer 120f 5-ACT GGC GGA CGG GTG AGT AA-3 and Reverse primer 5- CGT ATT ACC GCG GCT GCT GG-3) were used to amplify the variable region V2-V3 of 16S rRNA gene fragments. PCR fragments were purified and DNA sequencing (Macrogen, Seoul Korea). Searches of the GenBank database were done using the BLAST program in the National Center for Biotechnology Information website