Phylum Proteobacteria, Class Gammaproteobacteria, Order Vibrionales, Family Vibrionaceae, Genus Photobacterium,
Photobacterium angustum Reichelt, Baumann and Baumann 1979.
Gram-negative rods. Involution forms occur in old cultures and under adverse growth
conditions. Motile by means of unsheathed polar flagella .
Colonies are smooth, semitranslucent, convex, ivory. Grow on blood agar, BHI-agar,
TSA supplemented with 1% NaCl, thiosulfate citrate bile sucrose agar, and marine
agar. Is unable to grow in the absence of Na+; able to grow in nutrient broth with 1-6%
NaCl. Grow at 4-37 ºC (20-25 ºC optimum temperature). Facultative anaerobe,
chemoorganotrophic, not luminescent , no hemolysin production.
Isolated from the open ocean and the light organs of several fish species. Susceptible to vibriostatic agent O/129. Resistant to
penicillin-G, oxacillin, streptomycin & amoxicillin.
- An Thyssen , Frans Ollevier, 2004. Genus II . Photobacterium Beijerinck 1889. In: Bergey’s Manual of Systematic Bacteriology,
Second edition,Vol two, part B, George M. Garrity (Editor-in-Chief), pp. 546-555.
- 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, 256-257.
Positive results for methyl red, Voges-Proskauer, ONPG test, arginine dihydrolase, acid
production from: D-glucose, D-mannose & D-xylose.
Negative results for indole production, citrate utilization (Simmons), H2S production, urea hydrolysis, phenylalanine deaminase, lysine
decarboxylase, ornithine decarboxylase, esculin hydrolysis, nitrate reduction to nitrite, gas production from D-glucose, acid production
from: D-adonitol, L-arabinose, D-arabitol, cellobiose, dulcitol, D-galactose, myo-inositol, lactose, D-mannitol, melibiose, raffinose,
L-rhamnose, salicin & D-sorbitol.
Variable results for gelatin hydrolysis, oxidase, lipase, acid production from: maltose, sucrose & trehalose.
(c) Costin Stoica