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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Pseudomonas fluorescens
Category: Causes hemolysis
Etymology: Genus name: false unit
Species epithet: refers to the fluorescence of the colonies under UV-light.
Significance:  [Of minor importance]   
Taxonomy:
Phylum
Proteobacteria
Class
Gammaproteobacteria
Order
Pseudomonadales
Family
Pseudomonadaceae 
Genus
Pseudomonas
Type Strain: ATCC 13525 = CCUG 1253 = NCTC 10038.
Macromorphology (smell):
Micromorphology: Rod shaped
Gram +/Gram -:G-
Metabolism: Aerobic, but some strains are facultatively aerobic as they can utilize nitrate instead of oxygen, as a final electron acceptor in the respiratory chain.
Catalase/Oxidase:?/+
Spec. Char.: Optimal growth temperature is 25-30°C.
Reservoir: Is an environmental bacterium that can be found in soil and water.
Disease:Fin rot in especialla aquaria and aqua culture. Fin rot can also be caused by a fungal infection.
Hosts: Fish and immunocompromised humans.
Clinical Picture: The fins of the fish turn brownish black and break apart. Then the fin base becomes inflamed and the whole fin may fall off.
Virulence Factors: If the concentration of iron is low in the environment, a green fluorescent pigment, pyoverdine, is produced. Pyoverdine is a so-called siderophore.
Genome Sequence:
Acc-noStrainSize (bp)Genome
LT907842 ATCC 13525T 6 511 547  

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
FJ972536 NO7 1434  

Taxonomy/phylogeny:
Comment:A strain of P. fluorescence (Pf-CL145A) has been used to control invasive mussel species.

Milk contaminated by P. fluorescence becomes undrinkable.

Updated:2020-06-11

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New names of taxa within the classification category phylum

During October 2021, an article was published by A. Oren och G.M. Garrity, in which new names are proposed for a number of taxa within the classification category phylum. This has resulted in many discussions in social media about whether it was really necessary to make these changes, which have created confusion among microbiologists and other professionals who come into contact with bacteriology.

Published 2022-09-28. Read more...

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