Psychrobacter luti: Difference between revisions
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==Ecology and Pathogenesis== | ==Ecology and Pathogenesis== | ||
It is evident that cold environments constitute an ecological niche for Psychrobacter organisms and Antarctic environments are a source of Psychrobacter bacteria. | It is evident that cold environments constitute an ecological niche for Psychrobacter organisms and Antarctic environments are a source of Psychrobacter bacteria. | ||
Psychrobacter is present in the GI tract of Atlantic cod. | |||
==References== | ==References== |
Revision as of 02:00, 16 April 2010
Classification
Domain; Phylum; Class; Order; family [Others may be used. Use NCBI link to find]
Species
NCBI: Taxonomy |
Genus species
Description and Significance
Psychrobacter was created by Juni & Heym (1986) to accommodate a group of non-motile, oxidase-positive, non-pigmented, chiefly psychrotolerant, Gram-negative rods or coccobacilli isolated from the skin of fish and chickens and from various processed foods.
Describe the appearance, habitat, etc. of the organism, and why you think it is important.
Genome Structure
Describe the size and content of the genome. How many chromosomes? Circular or linear? Other interesting features? What is known about its sequence?
Cell Structure, Metabolism and Life Cycle
The isolates were oxidase-positive, halotolerant, Gram-negative,considerable halotolerance, non-motile coccobacilli with a strictly oxidative metabolism.
Neither diffusible pigments nor bioluminescence were observed. The cells of all bacterial isolates presented capsules and were about 0.4–1.8 by 0.4–0.8 mm in size.
The strains were moderately halophilic and tolerated NaCl levels of about 9.5–12.5%.
whereas colonies of NF11T, NF18, NF19 and NF20 were smooth, opaque, non-circular and spread little throughout the growth medium, with similar dimensions.
The pH range for growth was 6–9.5 and the growth temperature range was 4–30 oC for all the strains isolated
All strains were oxidase- and catalase-positive and capable of oxidative metabolism.
Except for strain NF11T, all the strains possessed urease activity. Does not
Strains NF11T, NF18, NF19 and NF20 reduced nitrate to nitrite.
deaminated phenylalanine
-None of the strains was capable of deaminating tryptophan.
-sensitive to penicillin.
-possessed L-alanine aminopeptidase, again indicating their Gramnegative character.
Able to grow in the absence of NaCl and
-can tolerate 9.5% (w/v) NaCl
Ecology and Pathogenesis
It is evident that cold environments constitute an ecological niche for Psychrobacter organisms and Antarctic environments are a source of Psychrobacter bacteria.
Psychrobacter is present in the GI tract of Atlantic cod.
References
Author
Page authored by Hahyung Y. Kim and Benjamin Kamphuis, student of Prof. Jay Lennon at Michigan State University.
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