Phylogenetic Analysis of the Genus Listeria Based on Reverse Transcriptase Sequencing of 16S rRNA

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Abstract
The phylogenetic interrelationships of members of the genus Listeria were investigated by using reverse transcriptase sequencing of 16S rRNA. The sequence data indicate that at the intrageneric level the genus Listeria consists of the following two closely related but distinct lines of descent: (i) the Listeria monocytogenes group of species (including Listeria innocua, Listeria ivanovii, Listeria seeligeri, and Listeria welshimeri) and (ii) the species Listeria grayi and Listeria murrayi. At the intergeneric level a specific phylogenetic relationship between the genera Listeria and Brochothrix was evident. The sequence data clearly demonstrated that the genus Listeria is phylogenetically remote from the genus Lactobacillus and should not be included in an extended family Lactobacillaceae.

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