Veterinary bacteriology: information about important bacteria
|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 names of bacterial phyla|
The taxonomic category phylum was previously not regulated by the International Code of Nomenclature of Prokaryotes (ICNP), but now this has changed and it was decided to revise the names of bacterial phyla. All phyla must be written in italics (which has been done on VetBact also before) and have the ending -ota.Published 2023-03-01. Read more...
|The taxonomy of chlamydias|
Species within the family Chlamydiaceae were previously divided into two genera Chlamydia and Chlamydophila. However, the differences between these two genera were not that great and many research groups have not accepted this division. Therefore, the genus Chlamydophila has been returned to the genus Chlamydia and this change has now been incorporated in VetBactPublished 2023-03-15. Read more...