Mycobacterium xenopi is a slow-growing scotochromogenic

Scotochromogenic

Scotochromogenic bacteria develop pigment in the dark or in the light. Runyon Group II nontuberculous mycobacteria are examples but the term could apply to many other organisms....

 species of Mycobacterium

Mycobacterium

Mycobacterium is a genus of Actinobacteria, given its own family, the Mycobacteriaceae. The genus includes pathogens known to cause serious diseases in mammals, including tuberculosis and leprosy...

. It was first reported by Schwabacher in 1959, having been isolated in lesion

Lesion

A lesion is any abnormality in the tissue of an organism , usually caused by disease or trauma. Lesion is derived from the Latin word laesio which means injury.- Types :...

s found on a Xenopus laevis, but the possibility of human infection was not confirmed until 1965.

It has low pathogenicity

Pathogenicity

Pathogenicity is the ability of a pathogen to produce an infectious disease in an organism.It is often used interchangeably with the term "virulence", although virulence is used more specifically to describe the relative degree of damage done by a pathogen, or the degree of pathogenicity caused by...

 in humans, and where infections have been found they are closely associated with immunocompromised individuals.

Type strain

Biological type

In biology, a type is one particular specimen of an organism to which the scientific name of that organism is formally attached...

: strain ATCC

American Type Culture Collection

The American Type Culture Collection is a private, not-for-profit biological resource center whose mission focuses on the acquisition, authentication, production, preservation, development and distribution of standard reference microorganisms, cell lines and other materials for research in the...

19250 = CCUG 28011 = CCUG 31306 = CIP 104035 = DSM 43995 = NCTC 10042.