Phylum Proteobacteria, Class Gammaproteobacteria, Order Vibrionales, Family Vibrionaceae, Genus Vibrio, Vibrio fortis Thompson,
Thompson, Hoste, Vandemeulebroecke, Gullian and Swings, 2003.
Historical synonyms: FAFLP (fluorescent amplified fragment length polymorphism) clusters A9 and A60, Thompson, Hoste,
Vandemeulebroecke & Swings, 2001.
Gram-negative, slightly curved cells, 1 x 3 µm.
Colonies on TSA are smooth, beige, low convex, translucent to opaque, not
swarming, 4 mm in diameter after 48 hours incubation at 28 ºC.
Strains form yellow and/or green, translucent colonies on TCBS agar.
Can grow in nutrient broth with: 1% to 8% NaCl; no growth in 0% or 10% NaCl.
Previous group A9 strains were found to be ubiquitous in the marine environment, associated with aquatic animals (Nodipecten
nodosus, Salmo salar, Crassostrea gigas).
The type strain , LMG 21557T (formerly group A9 member), was isolated from the white shrimp Litopenaeus vannamei in Ecuador.
Susceptible to O/129 vibriostatic agent.
Associated with both diseased and healthy aquatic animals (healthy and diseased bivalve larvae Nodipecten nodosus, Atlantic
salmon Salmo salar, diseased oyster larvae Crassostrea gigas)
- F.L. Thompson, C.C. Thompson, B. Hoste, K. Vandemeulebroeke, M. Gullian and J. Swings, 2003. Vibrio fortis sp. nov. and Vibrio
hepatarius sp.nov., isolated from aquatic animals and the marine environment. IJSEM 53, 1495-1501.
Positive results for indole production, oxidase, catalase, beta-galactosidase, nitrate
reduction, acid production from D-glucose & D-mannitol.
Negative results for H2S, urease, lysine decarboxylase, ornithine decarboxylase,
arginine dihydrolase, gelatinase, acid production from: D-sorbitol, inositol, L-rhamnose & arabinose.
Variable results for acid production from: sucrose, melibiose & amygdalin.
(c) Costin Stoica