inositol and trehalose but not from adonitol aesculin amygdalin L arabinose

Inositol and trehalose but not from adonitol aesculin

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inositol and trehalose, but not from adonitol, aesculin, amygdalin, L-arabinose, dulcitol, lactose, mannitol, melibiose, raffinose, rhamnose, salicin, sorbitol, sucrose or xylose. Growth occurs at 22 and 37°C, but not at 4°C, and in 0% (w/v) sodium chloride (Cruz et ciL, 1986; Klein et ciL, 1993). It should be emphasised that phylogenetic studies have indicated that the taxon should really belong in the genus Proteus as Proteus shigelloides (MacDonell and Colwell, 1985). Providencia rettgeri During 1976, there was a mass mortality among farmed silver carp (Hypophthal- michthys molitrix) in Israel. From moribund animals, Pr. rettgeri was isolated. To date, this has been the only report implicating this organism as a fish pathogen (Bejerano et al, 1979). Providencia rettgeri Cultures comprise fermentative. Gram-negative rods, which are motile by means of peritrichous flagella. Catalase, indole, phenylalanine deaminase and tryptophan deaminase are produced, but not P-galactosidase, H2S or oxidase. DNA and urea are degraded, but not casein, gelatin, starch or the Tweens. The methyl red test is positive. Nitrates are reduced. Acid is produced from adonitol, aesculin, erythritol, galactose, inositol, mannitol, mannose, melezitose, rhamnose and salicin, but not from amygdalin, arabinose, cellobiose, dulcitol, glycerol, glycogen, inulin, lactose, maltose, melibiose, raffinose, ribose, sorbitol, sucrose, trehalose or xylose. The G + C ratio of the DNA is 39.2 mol % (Bejerano et aL, 1979). Generally, the isolates matched the description of Pr. rettgeri (Cowan, 1974; Johnson et aL, 1975; McKell and Jones, 1976; Penner, 2005) Salmonella enterica subsp. arizonae (Salmonella choleraesuis subsp. arizonae = Salmonella arizonae) In a previous study by Austin et al. (1982), a possible taxonomic relationship was discussed between Y. ruckeri and Sal. choleraesuis subsp. arizonae. Therefore, it is ironic that the latter organism has now been involved in fish pathogenicity. Thus, Sal. enterica subsp. arizonae was recovered during 1986 from a single dead pirarucu, Arapaima gigas, which had been exhibited in an aquarium at Sapporo, Japan. To date, this is the only report implicating Sal. enterica subsp. arizonae as a fish pathogen (Kodama et al., 1987).
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108 Bacterial Fish Pathogens The culture was identified biochemically as Sal. enterica subsp. arizonae. Yet, agglutination was not recorded with commercial Salmonella antisera, although not specifically a product to Sal. enterica subsp. arizonae (Kodama et al., 1987). Salmonella enterica subsp. arizonae Cultures contain Gram-negative, fermentative, motile rods, which produce cata- lase, P-galactosidase, H2S and lysine decarboxylase, but not indole or oxidase. Neither aesculin, blood, casein, gelatin, starch nor urea is degraded. Citrate is utilised, nitrate is reduced and the methyl red test is positive. The Voges Proskauer reaction is negative. Acid is produced from glucose (plus gas), lactose, maltose, mannitol, raffinose, sorbitol, sucrose, trehalose and xylose, but not arabinose or salicin. Growth occurs at 15-4rC in 0-6% (w/v) NaCl and on MacConkey agar (Kodama et al, 1987).
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