Briefly, bacterial genomic DNA was extracted by phenol chloroform method and the 16S rRNA gene was amplified by using primers 8F
(5’–AGAGTTTGATCCTGGCTCAG-3’) and 1492 (5’–GGGCGGTGTGTA-
CAAGGC-3’). PCR conditions were as follows ; 35 cycles consisting
of initial denaturation at 95 1C for 5 min, denaturation at 95 1C for
1 min,annealing at 55 1C for 1 min and extension of 1.5 min at 72 1C,
followed by final extension of 5 min at72 1C.