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Reclassification of Serpulina intermedia and Serpulina murdochii in the genus Brachyspira as Brachyspira intermedia comb. nov. and Brachyspira murdochii comb. nov.

School of Veterinary and Biomedical Sciences, Murdoch University, Murdoch, Western Australia 6150, Australia

Correspondence
David J. Hampson
d.hampson{at}murdoch.edu.au

A reassessment was undertaken of published characteristics of the five species of anaerobic intestinal spirochaetes in the genus Brachyspira (Brachyspira aalborgi, Brachyspira alvinipulli, Brachyspira hyodysenteriae, Brachyspira innocens and Brachyspira pilosicoli) and the two species in the genus Serpulina (Serpulina intermedia and Serpulina murdochii). Comparisons were made of published descriptions, including phenotypic properties, grouping by multilocus enzyme electrophoresis, DNA base composition, DNA–DNA relative reassociation values and 16S rRNA gene sequence similarity. On the basis of extensive similarities between all the species, it is proposed to reclassify Serpulina intermedia Stanton et al. 1997 and Serpulina murdochii Stanton et al. 1997 in the genus Brachyspira, as Brachyspira intermedia comb. nov. (type strain ATCC 51140^T) and Brachyspira murdochii comb. nov. (type strain ATCC 51284^T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of Brachyspira intermedia ATCC 51140^T and Brachyspira murdochii ATCC 51284^T are U23033 and AY312492, respectively.

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