Photobacterium iliopiscarium
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Vibrionales, Family Vibrionaceae, Genus Photobacterium,  
Photobacterium iliopiscarium  
(Onarheim, Wiik, Burghardt and Stackebrandt 1994) Urakawa, Kita-Tsukamoto and Ohwada 1999.

Historical synonym:
Vibrio iliopiscarius Onarheim, Wiik, Burghardt and Stackebrandt 1994.
Gram-negative pleomorphic cells; in broth with more than 2% salt  bacteria (culture)
tend to aggregate.
Motile. In 2% NaCl broth medium without glucose, the dominant
morphology is curved rods.
Morphology of the colonies varies; in broth with more than 2% salt  bacteria (culture)
tend to aggregate, the dominant morphology of young cultures is small, colorless to
grayish & opaque.
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 1-3% NaCl.  Optimum growth temperature  20-25 ºC. Grow
at 4 ºC, no growth at 30, 35, 37 or 40 ºC. The ability to grow at different temperatures
varies with the medium composition.
Facultative anaerobe (growth is better under aerobic conditions), not luminescent, no
hemolysin production, chemoorganotrophic.
Isolated from the intestines of fish (herring, coal fish, cod, and salmon) living in cold seawater.
Susceptible to vibriostatic agent O/129, resistant to penicillin-G.
Unknown (none).
  1. 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.
  2. Urakawa, Hidetoshi, Kita-Tsukamoto, Kumiko, Ohwada, Kouichi. Reassessment of the taxonomic position of Vibrio iliopiscarius
    (Onarheim et al. 1994) and proposal for Photobacterium iliopiscarium comb. nov. Int J Syst Bacteriol 1999 49: 257-260.
Positive results for methyl red, Voges-Proskauer test, arginine dihydrolase, lysine decarboxylase, nitrate reduction to nitrite, acid
production from: D-glucose (with gas), D-galactose, maltose & D-mannose.

Negative results for indole
production, citrate utilization (Simmons), H2S production, urea hydrolysis, oxidase, ornithine decarboxylase,
gelatin hydrolysis, acid production from: D-adonitol, L-arabinose, D-arabitol, cellobiose, dulcitol, myo-inositol, lactose, D-mannitol,
melibiose, raffinose, L-rhamnose, salicin, D-sorbitol, sucrose & D-xylose.

Variable results for trehalose fermentation.
(c) Costin Stoica
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