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Int J Syst Evol Microbiol 55 (2005), 1675-1680; DOI  10.1099/ijs.0.63388-0
© 2005 International Union of Microbiological Societies

Treponema berlinense sp. nov. and Treponema porcinum sp. nov., novel spirochaetes isolated from porcine faeces

Marcel Nordhoff1, David Taras2, Moritz Macha2, Karsten Tedin1, Hans-Jürgen Busse3 and Lothar H. Wieler1

1 Institut für Mikrobiologie und Tierseuchen, Freie Universität Berlin, D-10115 Berlin, Germany
2 Institut für Tierernährung, Freie Universität Berlin, D-10115 Berlin, Germany
3 Institut für Bakteriologie, Mykologie und Hygiene, Veterinärmedizinische Universität, A-1210 Wien, Austria

Correspondence
Marcel Nordhoff
nordhoff.marcel{at}vetmed.fu-berlin.de

Limit-dilution procedures were used to isolate seven, helically coiled bacterial strains from faeces of swine that constituted two unidentified taxa. Comparative 16S rRNA gene sequence analysis showed highest similarity values with species of the genus Treponema indicating that the isolates are members of this genus. Strain 7CPL208T, as well as five further isolates, and 14V28T displayed the highest 16S rRNA gene sequence similarities with Treponema pectinovorum ATCC 33768T (92·3 %) and Treponema parvum OMZ 833T (89·9 %), respectively. Polar lipid profiles distinguished 7CPL208T and 14V28T from each other as well as from related species. Based on their phenotypic and genotypic distinctiveness, strains 7CPL208T and 14V28T are suggested to represent two novel species of the genus Treponema, for which the names Treponema berlinense sp. nov. and Treponema porcinum sp. nov. are proposed. The type strain for Treponema berlinense is 7CPL208T (=ATCC BAA-909T=CIP 108244T=JCM 12341T) and for Treponema porcinum 14V28T (=ATCC BAA-908T=CIP 108245T=JCM 12342T).

The GenBank/EMBL/DDBJ accession numbers for the 16S rRNA gene sequences of Treponema berlinense strain 7CPL208T and Treponema porcinum strain 14V28T are AY230217 and AY518274, respectively.

Transmission electron micrographs, SDS-PAGE analyses, genomic fingerprinting gels and polar lipid profiles are available as supplementary material in IJSEM Online.




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