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AllisonellaRANK: GenusTAXONOMY: Bacteria -> Terrabacteria group -> Firmicutes -> Negativicutes -> Selenomonadales -> Veillonellaceae -> Allisonella OVERVIEW: Cells are ovoid shaped, nonmotile, and form diploids or chains. Spores not observed. Cells stain Gram-negative. Resistant to ionophore and monensin. Catalase-, oxidase-, and indole-negative. Nonfermentative, facultative anaerobic, and chemoheterotrophic. Utilizes histidine as sole energy source. Produces histamine and CO2 as end products from histidine. Growth occurs in medium containing yeast extract, butyrate, and histidine. On the basis of 16S rRNA gene sequence comparisons, the genus Allisonella is a member of the family Veillonellaceae. DNA G+C content (mol%): 45–48 (HPLC). Type species: Allisonella histaminiformans This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072]
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