Vibrio xuii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Vibrionales, Family Vibrionaceae, Genus Vibrio, Vibrio xuii  Thompson et
al. 2003. Historical synonym: FAFLP group A8 Thompson, Hoste, Vandemeulebroecke & Swings, 2001.
Gram-negative, slightly curved cells, 1 x 2-3 µm, motile by at least one polar flagellum.
Colonies on TSA are translucent, not swarming, convex, smooth, rounded, beige,
2.5-3 mm in diameter after 48 h at 28 ºC. Colonies are yellow, transparent, umbonate,
round with scalloped margins, wavy, shiny, 2  mm in diameter on TCBS agar after 24
h at 28 ºC. Can grow in nutrient broth with:
2.5-8% NaCl. No growth in 0% NaCl & 10%
NaCl. Optimal growth at  30-35 ºC. No growth at 4 ºC or 40 ºC. Facultative anaerobe.
No luminescence produced.
Isolated from shrimp culture water in China, white shrimp Litopenaeus vannamei and from larvae of the bivalve Nodipecten nodosus
Sensitive to vibriostatic agent O/129, resistant to Kanamycin.
Unknown.
  1. F.L.Thompson, Y. Li, B. Gomez-Gil, C.C. Thompson, B.  Hoste , K. Vandemeulebroecke, G. S. Rupp, A. Pereira, M. M. De Bem, P.  
    Sorgeloos and J. Swings. Vibrio neptunius sp. nov., Vibrio brasiliensis sp. nov. and Vibrio xuii sp. nov., isolated from the marine
    aquaculture  environment (bivalves, fish, rotifers and shrimps). IJSEM 53, 245-252.
Positive results for arginine dihydrolase, indole, oxidase, catalase, acid phosphatase,
alkaline phosphatase, lipase (C14), esterase (C4), esterase lipase (C8), nitrate
reduction, methyl red, Voges-Proskauer reaction, tryptophan deaminase,  acid
production from: sucrose, arabinose, D-glucose, mannitol & amygdalin.
Can utilize as sole carbon source: citrate, alpha-cyclodextrin, Tweens 40 and 80, N-acetyl-D-galactosamine, L-arabinose, cellobiose,
D-mannitol, D-mannose, D-sorbitol, sucrose, methyl pyruvate, monomethyl succinate, acetic acid, D-gluconic acid,
beta-hydroxybutyric acid, gamma-hydroxybutyric acid, p-hydroxyphenylacetic acid, alpha-ketoglutaric acid, D-alanine, glycyl L-glutamic
acid, L-proline, L-threonine, 2,3-butanediol, glycerol & DL-alpha-glycerol phosphate.

Negative results for lysine decarboxylase, ornithine decarboxylase, alpha-galactosidase, beta-galactosidase, valine arylamidase, H
2S
production
, urease, alpha-glucosidase, beta-glucosidase, gelatinase, alpha-chymotrypsin, trypsin, acid production from: sorbitol,
melibiose, inositol & rhamnose.
No utilization of: D-galactose, gentiobiose, methyl beta-Dglucoside, D-raffinose, alpha-ketobutyric acid, propionic acid, D-serine,
quinic acid, sebacic acid, hydroxy-L-proline, 2-aminoethanol & glucose 1-phosphate.
(c) Costin Stoica
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