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Gemella
Scientific classification
Kingdom: Bacteria
Phylum: Firmicutes
Class: Bacilli
Order: Bacillales
Family: Staphylococcaceae
Genus: Gemella
Berger 1960
Species[1]

G. bergeri
G. cuniculi
G. haemolysans
G. morbillorum
G. palaticanis
G. sanguinis

Gemella is a genus of Gram-positive bacteria that thrive best at high partial pressure of CO2. They are faculatively anaerobic and give negative reactions to both oxidase and catalase tests. They are obligately fermentative, producing either a mixture of acetic and lactic acids or an equimolar molar mixture of acetic acid and CO2. For example, G. haemolysans ferments glucose forming a mixture of acetic and lactic acids in the absence of oxygen, whereas when oxygen is present, it forms acetic acid and CO2[2].

Gemellas are primarily found in the mucous membranes of humans and other animals, particularly in the oral cavity and upper digestive tract.

References

  1. ^ Euzéby, J. P.. "List of Prokaryotic Names with Standing in Nomenclature". http://www.bacterio.cict.fr. Retrieved 2008-12-16.  
  2. ^ Stackebrandt, E., B. Wittek, E. Seewaldt, and K. H. Schleifer (1982). "Physiological, biochemical and phylogenetic studies on Gemella haemolysans". FEMS Microbiology Letters 13: 361–365. doi:10.1111/j.1574-6968.1982.tb08288.x.  
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