Amplified ribosomal DNA restriction analysis (ARDRA) in which the almost complete 16S rRNA gene was used as the target of the PCR assay and randomly and repetitive element-primed PCR were used to characterize 67 strains belonging to the family . Particular emphasis was placed on strains of (13 strains), (10 strains), and (10 strains) (these organisms were referred to as the group), as well as (19 strains). Our data indicate that strains belonging to the group behave as a single species comparable to strains of . ARDRA allowed us to differentiate among all other species as well but was not useful for infraspecific typing. Randomly and repetitive element-primed PCR could be used to distinguish several infraspecific types within and the group and allowed us to differentiate these two taxa.


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