|Etymology:||Genus name: small fungus-like rod.|
Species epithet: from the sea.
|Significance:||[Of minor importance]|
|Type Strain:||ATCC 927 = CCUG 20998 and 27843 = NCTC 2275.|
|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)|
|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.|
|16S rRNA Seq.:|
||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|
|New families introduced within the order Enterobacterales|
The order Enterobacterales (formerly called Enterobacteriales) previously consisted of bacteria with different properties and phylogenetically, these bacteria were far apart. In order for the taxonomy to be more in line with phylogeny, some of these bacteria have, therefore, been sorted into 6 new families.Published 2022-04-13. Read more...