Vibrio metschnikovii
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Vibrionales, Family Vibrionaceae, Genus Vibrio, Vibrio metschnikovii  
Gameleia 1888.
Historical synonym:
Vibrio cholerae biovar proteus Shewan and Veron 1974.
Gram-negative, straight or curved rods, 0.6-0.8 x 2-3 µm, variable motility. No lateral
flagella on solid media.
Beta-hemolytic on T-soy agar with 5% sheep blood. Opaque, glistening, dark-greyish,
flattened, convex colonies, pale-grey centers, intact edges, diameter 3-4 mm on blood
agar in 24 h.
Can grow in nutrient broth with: 1% NaCl & 6% NaCl. Variable growth in 8% NaCl. No
growth in 0% NaCl, 10% NaCl & 12% NaCl. Can grow at pH 10. Optimal growth at  
30-40 ºC. At 4 ºC grow slowly but become non-viable or non-culturable.
Isolated from fresh, brackish and marine waters , sewage, cockles, shrimp, lobster, crab and  fowl, rarely from human clinical
specimens (blood, urine, a foot wound, gall bladder and other sources). One isolate from the lung of a dead calf .
Isolated from blood from an woman (82 year old) with peritonitis and an inflamed gallbladder. May produce pneumonia, wound
infections, bacteremia and septicaemia.
  1. J.J. Farmer, M. Janda, 2004. Family I. Vibrionaceae. In:  Bergey’s Manual of Systematic Bacteriology, Second edition,Vol two, part
    B, George M. Garrity (Editor-in-Chief), pp. 491-546.
  2. J. G.Holt et al., 1994. Group 5 Facultatively anaerobic Gram-negative rods. Subgroup 2 Family Vibrionaceae. In: Begey’s Manual of
    Determinative Bacteriology, 9-th edition, Williams & Wilkins. pp. 190-194.
  3. Judith A. Johnson, 2006. Vibrio. In: Topley & Wilson’s Microbiology and Microbial Infections, 10 edition, Vol. 2, Bacteriology,
    Edward Arnold Ltd., 1507-1523.
  4. Hansen, W, Freney, J, Benyagoub, H, Letouzey, M N, Gigi, J, Wauters, G. Severe human infections caused by Vibrio metschnikovii.
    J. Clin. Microbiol. 1993 31: 2529-2530.
Positive results for: methyl red (1% NaCl), Voges-Proskauer (1% NaCl), gelatin hydrolysis (1% NaCl, 22 °C), lipase, catalase, acid
production from D-glucose, glycerol, maltose, trehalose, D-mannitol, D-mannose & sucrose.

Negative results for indole production (Heart Infusion Broth, 1% NaCl), H
2S on TSI, urea hydrolysis, phenylalanine deaminase,
ornithine (1% NaCl), nitrate reduction to nitrite, oxidase,  gas production from D-glucose, acid production from D-adonitol,
L-arabinose, D-arabitol, cellobiose, dulcitol, melibiose, raffinose, L-rhamnose, salicin & D-xylose.

Variable results for citrate utilization (Simmons), arginine (1% NaCl), lysine (1% NaCl), esculin hydrolysis, ONPG test, acid production
from D-galactose, myo-inositol, lactose & D-sorbitol.
(c) Costin Stoica
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