| Mesophilobacter marinus |
Positive results for catalase, methyl red test, oxidase, acid production (without gas) from: cellobiose, D-fructose, D-glucose,
D-mannitol and D-ribose.
Can assimilate: D-ribose, D-glucose, D-fructose, maltose, sucrose, trehalose, acetate, citrate, succinate, fumarate, malate, and
gluconate.
Negative results for H2S production, phenylalanine deaminase and Voges-Proskauer test.
Variable results for indole production.
D-mannitol and D-ribose.
Can assimilate: D-ribose, D-glucose, D-fructose, maltose, sucrose, trehalose, acetate, citrate, succinate, fumarate, malate, and
gluconate.
Negative results for H2S production, phenylalanine deaminase and Voges-Proskauer test.
Variable results for indole production.
Taxonomy
Morphology
Cultural characteristics
Biochemical characters
Ecology
Pathogenicity
References
Phylum Pseudomonadota (Proteobacteria), Class Gammaproteobacteria, Order Pseudomonadales, Family Pseudomonadaceae,
Genus Mesophilobacter, Mesophilobacter marinus Nishimura et al. 1989, type species of the genus.
Genus Mesophilobacter, Mesophilobacter marinus Nishimura et al. 1989, type species of the genus.
Gram-negative coccobacilli, 0.5-0.6 x 1.0 to 2.0 µm. Pleomorphic. A plump form
(0.8-1.0 x 1.5-3.0 µm) and elongated cells (15 µm or more long) occur in young
cultures, and coccoid cells (0.6-0.9 µm in diameter) occur in old cultures. Non-motile.
Non-spore-forming. Non-encapsulated. Non-acid fast.
(0.8-1.0 x 1.5-3.0 µm) and elongated cells (15 µm or more long) occur in young
cultures, and coccoid cells (0.6-0.9 µm in diameter) occur in old cultures. Non-motile.
Non-spore-forming. Non-encapsulated. Non-acid fast.
Colonies on nutrient agar are mostly circular, sometimes irregular, smooth, slightly
convex, entire, glistening, opaque, and pale yellowish brown. Non-haemolytic. Growth
in nutrient broth is moderate and turbid, and a slight sediment is formed. Grows well
at 33-37 ºC; growth also occurs at 5 ºC but not at 0 ºC. Growth occurs in broth
containing 7% NaCl. Aerobic. Litmus milk is unchanged.
convex, entire, glistening, opaque, and pale yellowish brown. Non-haemolytic. Growth
in nutrient broth is moderate and turbid, and a slight sediment is formed. Grows well
at 33-37 ºC; growth also occurs at 5 ºC but not at 0 ºC. Growth occurs in broth
containing 7% NaCl. Aerobic. Litmus milk is unchanged.
Isolated from seawater, Otsuchi Bay, Iwate Prefecture, Japan. Resistant to penicillin.
Undetermined.
- Nishimura Y, Kinpara M, Iizuka H. Mesophilobacter marinus gen. nov., sp. nov.: an aerobic coccobacillus isolated from seawater.
Int. J. Syst. Bacteriol. 1989; 39:378-381.
(c) Costin Stoica
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