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MegasphaeraRANK: GenusTAXONOMY: Bacteria -> Terrabacteria group -> Firmicutes -> Negativicutes -> Selenomonadales -> Veillonellaceae -> Megasphaera OVERVIEW: 'Megasphaera' is a genus of Firmicutes bacteria classified within the class Negativicutes.Anaerobic. Gram-stain-negative cocci, 0.4–2.0 µm or more in diameter. Nonmotile. Endospores not formed. Glucose, fructose, and lactate may or may not be fermented. Gas may or may not be produced. Gelatin or milk is not hydrolysed and nitrate is not reduced. Pyruvate but not succinate is utilized. Common metabolic end products of all five species described are acetic, propionic, butyric, and valeric acid. Found in the rumen of cattle and sheep, in the feces and intestine of man, in human clinical samples, and in spoiled bottled beer.DNA G+C content (mol%): 42.4–46.4 (Tm), 53.6 (Bd).Type species: Megasphaera elsdenii This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072]
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