Reclassification of Bacteroides forsythus (Tanner et al. 1986) as Tannerella forsythensis corrig., gen. nov., comb. nov

Int J Syst Evol Microbiol. 2002 May;52(Pt 3):841-849. doi: 10.1099/00207713-52-3-841.


The characteristics of the fusiform species Bacteroides forsythus, isolated from human periodontal pockets, were examined. 165 rDNA sequence analysis confirmed that B. forsythus was not a species within the genus Bacteroides sensu stricto. Although B. forsythus was phylogenetically related to Bacteroides distasonis and Bacteroides merdae in the phylogenetic tree, the ratio of anteiso-15:0 to iso-15:0 in whole-cell methanolysates of B. forsythus was different from those of B. distasonis, B. merdae and other Bacteroides species. B. forsythus did not grow on medium containing 20% bile, but members of the Bacteroides fragilis group did. B. forsythus was the only species tested that was trypsin-positive in API ZYM tests. The dehydrogenase enzyme pattern was of no use for the differentiation of B. forsythus and the B. fragilis group. On the basis of these data, a new genus, Tannerella, is proposed for Bacteroides forsythus, with one species, Tannerella forsythensis corrig., gen. nov., comb. nov. The type strain of Tannerella forsythensis is JCM 10827T (= ATCC 43037T).

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Bacterial Typing Techniques
  • Bacteroides / chemistry
  • Bacteroides / classification*
  • Bacteroides / enzymology
  • Bacteroides / genetics
  • Bile / metabolism
  • DNA, Ribosomal / analysis
  • Fatty Acids / analysis
  • Humans
  • Mice
  • Molecular Sequence Data
  • Periodontal Pocket / microbiology*
  • Phylogeny
  • RNA, Ribosomal, 16S / genetics
  • Reagent Kits, Diagnostic
  • Sequence Analysis, DNA
  • Vitamin K 2 / analysis


  • DNA, Ribosomal
  • Fatty Acids
  • RNA, Ribosomal, 16S
  • Reagent Kits, Diagnostic
  • Vitamin K 2

Associated data

  • GENBANK/AB053938
  • GENBANK/AB053939
  • GENBANK/AB053940
  • GENBANK/AB053941
  • GENBANK/AB053942
  • GENBANK/AB053943
  • GENBANK/AB053944
  • GENBANK/AB053945
  • GENBANK/AB053946
  • GENBANK/AB053947