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Kingella kingae is a species of Gram-negative facultative anaerobic β-hemolytic coccobacilli. First isolated in 1960 by Elizabeth O. King , it was not recognized as a significant cause of infection in young children until the 1990s, when culture techniques had improved enough for it to be recognized.
Elizabethkingia meningoseptica is a Gram-negative, rod-shaped bacterium widely distributed in nature (e.g. fresh water, salt water, or soil). It may be normally present in fish and frogs; it may be isolated from chronic infectious states, as in the sputum of cystic fibrosis patients.
HACEK is an abbreviation of the initials of the genera of this group of bacteria: Haemophilus, Aggregatibacter (previously Actinobacillus), Cardiobacterium, Eikenella, Kingella. [1] The HACEK organisms are a normal part of the human microbiota, living in the oral-pharyngeal region. [2]
Kingella is a genus of bacteria of the family Neisseriaceae. [1] It belongs to the HACEK group of fastidious Gram-negative bacteria that tend to cause endocarditis . [ 2 ] Kingella kingae is its type species .
When certain microorganisms are grown on blood agar, they may digest the blood in the medium, causing visible hemolysis (destruction of red blood cells) on the agar plate. In colonial morphology, hemolysis is classified into three types: alpha-, beta-, and gamma-hemolysis.
Elizabethkingia is a genus of bacterium in the order of Flavobacteriales.It was established in 2005 from a branch in of the genus Chryseobacterium, [1] and named after Elizabeth O. King, the discoverer of the type species. [2]
In the 1960s, King identified a novel bacteria from human respiratory secretions, blood, and bone and joint exudates that was designated Moraxella kingii in her honor shortly after her death. In 1976 it was reassigned to the genus Kingella and given the species name Kingella kingae. [7] [8]
As of March 2016, it was reported to be the largest outbreak of Elizabethkingia anophelis-caused disease investigated by the Centers for Disease Control and Prevention (CDC).