Colonies on sheep blood agar after 24h incubation at 37 ºC, are nonhemolytic, gray, 1
mm in diameter. Growth occurs at 25-42 ºC, optimally at 37 ºC. Can grow in 1-2%
(w/v) NaCl. Can grow on MacConkey agar. Facultatively anaerobic. 5% CO2 does not
Phylum Proteobacteria, Class Betaproteobacteria, Order Neisseriales, Family Chromobacteriaceae, Genus Laribacter, Laribacter
hongkongensis Yuen et al. 2002, type species of the genus.
Gram-negative, seagull-shaped or spiral rods, 0.2-0.5 x 1.0-1.6 μm. Nonflagellated
and nonmotile. Spores are not formed.
Isolated from the blood and empyema of a cirrhotic 54-year-old Chinese patient.
Sensitive to ampicillin, cephalothin, cefuroxime, ceftazidime, ceftriaxone, imipenem, azetreonam, erythromycin, clarithromycin,
gentamicin, amikacin, ciprofloxacin, levofloxacin, chloramphenicol, tetracycline, co-trimoxazole, and polymyxin B.
Resistant to vancomycin, clindamycin, metronidazole, and 0/129 vibriostatic agent.
Strain was isolated from sterile body fluids from a patient with local and systemic responses (high fever, leukocytosis and neutrophilia).
- Yuen K.Y., Woo P.C.Y., Teng J.L.L., Leung K.W., Wong M.K.M. and Lau S.K.P.: Laribacter hongkongensis gen. nov., sp. nov., a novel
Gram-negative bacterium isolated from a cirrhotic patient with bacteremia and empyema. J. Clin. Microbiol., 2001, 39, 4227-4232.
- Euzeby (J.P.): List of Bacterial Names with Standing in Nomenclature: a folder available on the Internet. Int. J. Syst. Bacteriol., 1997,
47, 590-592. (List of Prokaryotic names with Standing in Nomenclature. http://www.bacterio.net).
Positive results for arginine dihydrolase, catalase, nitrate reduction & oxidase.
Can utilize gluconate, caprate & adipate.
Negative results for esculin hydrolysis, beta-galactosidase, gelatin hydrolysis, H2S production, indole production, lysine
decarboxylase, ornithine decarboxylase, Voges-Proskauer reaction.
Does not ferment, oxidize, or assimilate: adonitol, amygdalin, arabinose, dulcitol, glucose, inositol, lactose, maltose, mannitol,
mannose, melibiose, raffinose, rhamnose, salicin, sorbitol, sucrose & xylose.
No utilization of: citrate, malonate, N-acetylglucosamine, gluconate & phenylacetate.
(c) Costin Stoica