Cycle conditions were
the same as those described for the 16S rRNA gene
amplification except that the annealing temperature was
68 uC. For sequencing, primer 870Rev was used. The
obtained sequences were aligned using CLUSTAL_X, version
2.0 (Thompson et al., 1997) and distance matrices of the
resulting multiple sequence alignments were calculated
using TREECON (Van de Peer & De Wachter, 1997). Rooted
phylogenetic trees were then constructed by the neighbourjoining
method, within the TREECON program. The values for
sequence similarities among the most closely related strains
were determined using the EzTaxon server (Chun et al.,
2007).
The 16S rRNA ge