Bacteroides termitidis (Sebald) differs so much from the type species of the genus Bacteroides, Bacteroides fragilis (Castellani and Chalmers), that it should not be retained within this genus. On the basis of biochemical, chemical, and genetic criteria, we propose that Bacteroides termitidis be reclassified in a new genus, Sebaldella, as Sebaldella termitidis comb. nov., the type species of the genus. The type strain of S. termitidis is strain NCTC 11300 (= ATCC 33386).
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