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Swedish University of Agricultural Sciences

Veterinary bacteriology: information about important bacteria
Veterinary bacteriology


Species/Subspecies: Mycobacterium marinum
Category: Zoonotic
Etymology: Genus name: small fungus-like rod.
Species epithet: from the sea.
Significance:  [Of minor importance]   
Taxonomy:
Phylum
Actinobacteria
Class
Actinobacteria
Order
Corynebacteriales
Family
Mycobacteriaceae 
Genus
Mycobacterium
Type Strain: ATCC 927 = CCUG 20998 and 27843 = NCTC 2275.
Macromorphology (smell):
Micromorphology: Acid-alcohol-fast long rods. It has been reported that M. marinum can form endospores. This finding is, however, controversial (see references 105 and 106 below) and has not been verified.
Gram +/Gram -:G+ (but difficult to gram stain)
Metabolism: Aerobic-
Catalase/Oxidase:
Other Enzymes: Urease +.
Spec. Char.: M. marinum is a slow grower (it takes more than 7 days to see colonies with the naked eye).Generation time: 6-11 h. Photochromogenic. Optimal growth temperature: 33°C.
Disease:Intracellular granulomatous disease in fish. Swimming pool granuloma in humans.
Hosts: Fish, frogs and other poikilothermic animals. Can cause skin lesions in humans.
Clinical Picture:
Genome Sequence:
Acc-noStrainSize (bp)Genome
NC_010612 ATCC BAA-535 6 636 827 1c + 1c 

16S rRNA Seq.:
Acc-noStrainNumber of NTOperon
AF456240 (T) 1522 

Taxonomy/phylogeny:
 
About 175 species have been described within genus Mycobacterium and this genus is closely related to Rhodococcus, Nocardia and Corynebacterium. M. marinum is very closely related to M. ulcerans.
Comment:M. marinum can produce a yellow photochromogenic pigment in contrast to M. ulcerans.
Reference(s): No. 72, 105, 106
Updated:2020-10-28

News

The revised taxonomy of the mollicutes

The revised taxonomy of mollicutes (mycoplasmas) has now been introduced on VetBact, which means that many of the species have been given new genus names or moved to another higher taxon. 

Published 2021-11-25. Read more...

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