Candidates for this genetic area in bacteria included the genes that code for the 5S, the 16S and the 23S rRNA and the spaces between these genes. The part of the DNA now most commonly used for taxonomic purposes for bacteria is the 16S rRNA gene (Tortoli, 2003; Harmsen, and Karch, 2004). The 16S rRNA gene can be compared not only among all bacteria but also with the 16S rRNA gene of archeobacteria and the 18S rRNA gene of eucaryotes (Woese, et al., 1985).