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Three independent isolates of Gram-reaction-negative cocci collected from two New York State patients and a dog’s mouth in California were subjected to a polyphasic analysis. The 16S rRNA gene sequence similarity among these isolates is 99.66 to 99.86 %. The closest species with a validly published name is Neisseria zoodegmatis (98.7 % 16S rRNA gene sequence similarity) with six additional species of the genus Neisseria with greater than 97 % similarity. Average nucleotide identity (ANI) and genome-to-genome distance calculator (GGDC 2.0) analysis on whole genome sequence data support the three novel isolates as being from a single species that is distinct from all other closely related species of the genus Neisseria . Phylogenetic analysis of 16S rRNA gene sequences and ribosomal multilocus sequence typing (rMLST) indicate the novel species belongs in the genus Neisseria . This assignment is further supported by the predominant cellular fatty acids composition of C16 : 0, summed feature 3 (C16 : 1ω7c/C15 : 0iso 2-OH), and C18 : 1ω7c, and phenotypic characters. The name Neisseria dumasiana sp. nov. is proposed, and the type strain is 93087T (=DSM 104677T=LMG 30012 T).
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