Thirty-seven similar strains isolated from feces of cats and dogs and from human diarrheal feces had characteristics of the genus . These organisms were distinguished from the only previously described species, , by producing acid from adonitol but not from fructose, raffinose, or sucrose and by the lack of α-glucosidase. The G+C contents of the DNAs of the new strains were 39 to 42 mol%. The results of morphological, physiological, DNA G+C content, and DNA homology studies support the proposal that the description of the genus should be emended so that a new species can be included in the genus. The new species is proposed, with strain A273/88 (= NCTC 12467) as the type strain.


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