KingellaKingella is a genus of bacteria of the family Neisseriaceae. It belongs to the HACEK group of fastidious Gram-negative bacteria that tend to cause endocarditis. Kingella kingae is its type species.SpeciesAs of 2021, five species belong to the genus:Kingella denitrificans Snell & Lapage 1976Kingella kingae Henriksen & Bøvre 1976Kingella negevensis El Houmami et al. 2017Kingella oralis corrig. Dewhirst et al. 1993Kingella potus Lawson et al. 2005