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Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Proteobacteria => Gammaproteobacteria => Vibrionales => Vibrionaceae => Vibrio => Vibrio metschnikovii Gameleia 1888.
Historical synonym: Vibrio cholerae biovar proteus Shewan and Veron 1974.
Historical synonym: Vibrio cholerae biovar proteus Shewan and Veron 1974.
Gram negative, straight or curved rods, 0.6-0.8 x 2-3µm, variable motility. No lateral
flagella on solid media.
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 °C. At 4 °C grow slowly but become nonviable or non-culturable.
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 °C. At 4 °C grow slowly but become nonviable 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 .
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 & septicaemia.
infections, bacteremia & septicaemia.
- 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. - J. G.Holt et al., 1994.Begey’s manual of Determinative Bacteriology, 9-th edition, Williams & Wilkins.
- Judith A. Johnson, 2006. Vibrio. In: Topley & Wilson’s Microbiology and Microbial Infections, 10 edition, Vol. 2, Bacteriology,
Edward Arnold Ltd., 1507-1523. - 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), H2S 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.
production from D-glucose, glycerol, maltose, trehalose, D-mannitol, D-mannose & sucrose.
Negative results for indole production (Heart Infusion Broth, 1% NaCl), H2S 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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