Pseudomonas anguilliseptica
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Proteobacteria, Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae, Genus Pseudomonas,
Pseudomonas anguilliseptica
Wakabayashi & Egusa 1972.
Gram-negative, motile (more intense at 15-25 ºC) with monotrichous flagella, 0.4 x 2
μm rods. Filamentous forms of 0.8 x 5-10 μm may be formed.
On solid medium: small (< 1 mm), round, regular, convex, grayish colonies. Pigments
are not produced. May be hemolytic. Aerobic, growth temperature 4-30 ºC. Does not
grow at 37 ºC. Grows on: Trypticase Soy Agar; Mueller-Hinton agar; Mac Conkey agar;
Cytophaga agar.
Isolated from water & fish (Anguilla japonica, Anguilla anguilla).
Causes “red spot disease” in fish (eels) - petechial haemorrhages on the skin and internal organs. Pathogenicity is increased when
water temperature falls below 16 ºC. May be a cause of eye disease in Baltic herring.  Pathogenic to japanese eel, ayu, loach
(
Misgurnus anguillicaudatus) and blue-gill sunfish (Lepomis macrochirus).
Under laboratory conditions expressed low pathogenicity to rainbow trout, carp (
Cyprinus carpio), crucian carp (Carassius carassius),
and goldfish (
Carassius auratus).
  1. Wakabayashi H. & Egusa S.: Characteristics of a Pseudomonas sp. from an epizootic of pond-cultured eels (Anguilla japonica).
    Bulletin of the Japanese Society of Scientific Fisheries, 1972, 38, 577-587.
  2. Bram Vanparys, Kim Heylen, Liesbeth Lebbe and Paul De Vos: Pseudomonas peli sp. nov. and Pseudomonas borbori sp. nov.,
    isolated from a nitrifying inoculum. Int J Syst Evol Microbiol, 56, (2006), 1875-1881.
  3. Franck C.,  J. Berthe, Christian Michel, Jean-Franqois Bernardet : Identification of Pseudomonas anguilliseptica isolated from
    several fish species in France. DISEASES OF AQUATIC ORGANISMS, vol. 21: 151-155, 1995.
  4. Lars Lonnstrom, Tom Wiklund, Goran Bylund: Pseudomonas anguilliseptica isolated from Baltic herring Clupea harengus
    membras with eye lesions. DISEASES OF AQUATIC ORGANISMS, Vol. 18: 143-147,1994.
Positive results for oxidase, catalase & leucine arylamidase.
Strains initially capable of hydrolyzing gelatin readily lost this property after subculture.
Can utilize citrate, caprate, malate & D-galactose.

Negative results for cystine arylamidase, alpha- and beta-galactosidase, beta-glucuronidase, alpha- and beta-glucosidase,
N-acetyl-beta-glucosaminidase, alpha-mannosidase, nitrates reduction, alpha-fucosidase, indole production, acidification of
glucose, arginine dihydrolase, urease & aesculin hydrolysis.
No utilization of: adipate, phenylacetate, erythritol, D-arabinose, L-xylose, D-adonitol, methyl beta-D-xyloside, L-sorbose, L-rhamnose,
dulcitol, inositol, D-sorbitol, methyl alpha-D-mannoside, methyl alpha-D-glucoside, amygdalin, arbutin, aesculin, salicin, D-cellobiose,
D-lactose, D-melibiose, inulin, D-melezitose, D-raffinose, starch, glycogen, xylitol, gentiobiose, D-turanose, D-lyxose, D-tagatose, D-
and L-fucose, L-arabitol, glycerol, L-arabinose, D-ribose, D-xylose, D-glucose, D-fructose, D-mannose, D-mannitol, D-maltose,
sucrose, D-trehalose, D-arabitol, N-acetylglucosamine, gluconate, 2- and 5-ketogluconate.
(c) Costin Stoica
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