 | |||||
EikenellaRANK: GenusTAXONOMY: cellular organisms -> Bacteria -> Proteobacteria -> Betaproteobacteria -> Neisseriales -> Neisseriaceae -> Eikenella OVERVIEW: Straight rods, 0.3–0.4 × 1.5–04.0 µm, unbranched, with rounded ends and a regular morphology. Short filaments are occasionally formed. Nonsporeforming. Gram negative. Nonmotile, possessing no flagella; however, a “twitching motility” may occur on agar surfaces. Facultatively anaerobic. Optimal growth temperature, 35–37°C. Colonies may appear to corrode the surface of the agar; noncorroding strains may also occur. Nonhemolytic; a slight greening of blood media around colonies may occur. Oxidase positive (Kovacs method). Negative for catalase, urease, arginine dihydrolase, and indole. Lysine-decarboxylase positive. Nitrates are reduced to nitrites. No acid is formed from glucose or other carbohydrates. Hemin is usually required for growth under aerobic conditions. Occur in the human mouth and intestine; can be opportunistic pathogens.The mol% G + C of the DNA is: 56–58.Type species: Eikenella corrodens This genus contains microbial species that can reside in the human gastrointestinal tract. [PMC 4262072] |