''Mycobacterium psychrotolerans'' is a rapidly growing

mycobacterium ''Mycobacterium'' is a genus of over 190 species in the phylum Actinomycetota, assigned its own family, Mycobacteriaceae. This genus includes pathogens known to cause serious diseases in mammals, including tuberculosis ('' M. tuberculosis'') and ...

first isolated from pond water near a uranium mine in Spain. It was able to grow at 4°C and is therefore considered to be

psychrotolerant Psychrophiles or cryophiles (adj. ''psychrophilic'' or ''cryophilic'') are extremophile, extremophilic organisms that are capable of cell growth, growth and reproduction in low temperatures, ranging from to . They have an optimal growth temperat ...

Etymology Etymology ()The New Oxford Dictionary of English (1998) – p. 633 "Etymology /ˌɛtɪˈmɒlədʒi/ the study of the class in words and the way their meanings have changed throughout time". is the study of the history of the Phonological chan ...

: , cold; , tolerating.

Description

Microscopy *

Gram-positive In bacteriology, gram-positive bacteria are bacteria that give a positive result in the Gram stain test, which is traditionally used to quickly classify bacteria into two broad categories according to their type of cell wall. Gram-positive bacte ...

acid-fast Acid-fastness is a physical property of certain bacterial and eukaryotic cells, as well as some sub-cellular structures, specifically their resistance to decolorization by acids during laboratory staining procedures. Once stained as part of a sam ...

, non-spore-forming, non-motile short rods. Colony characteristics *Smooth, entire, bright orange, scotochromogenic colonies appear after 2 days in GYEA, Bennett's and nutrient agars. Physiology *Growth on Lowenstein–Jensen agar is moderate. *No growth occurs on MacConkey agar. *Grows at 4–37C and tolerates 7% NaCl. *The type strain is resistant to ampicillin, cefuroxime, cloxacillin, erythromycin, penicillin and polymyxin. Sensitive to ciprofloxacin, gentamicin, neomycin and oxytetracycline. Differential characteristics *Growth at 4°C.

Pathogenesis

*First isolated from an environmental source, not known to be pathogenic.

Type strain

*The type strain was isolated from a pond in Salamanca, Spain. *Strain WA101 = DSM 44697 = JCM 13323 = LMG 21953

References

*Trujillo M.E.,et al., 2004. ''Mycobacterium psychrotolerans'' sp. nov., isolated from pond water near a uranium mine. Int. J. Syst. Evol. Microbiol., 54, 1459–1463.

External links

Type strain of ''Mycobacterium psychrotolerans'' at Bac''Dive'' - the Bacterial Diversity Metadatabase
Acid-fast bacilli psychrotolerans Bacteria described in 2004 {{Mycobacterium-stub