G. asaccharolytic[1] G. bergeri G. cuniculi G. haemolysans G. morbillorum G. palaticanis G. parahaemolysans[1] G. sanguinis G. taiwanensis[1] Gemella is a genus of Gram-positive bacteria that thrive best at high partial pressure of CO2.
[citation needed] They are facultatively anaerobic and give negative reactions to both oxidase and catalase tests.
[5] Gemella bacteria are primarily found in the mucous membranes of humans and other animals, particularly in the oral cavity and upper digestive tract.
[6] As of the year 2000 it had been reported in 15 cases of human endocarditis, mainly in men with underlying valvular disease and/or poor dentition or dental manipulation.
[7] Additionally, Gemella asaccharolytica in bacterial vaginosis is associated with increase risk of HIV infection in unprotected sex.