scotochromogenic


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sco·to·chro·mo·gen·ic

(skō'tō-krō'mō-jen'ik)
Refers to microorganisms (e.g., Mycobacterium scrofulaceum) that produce pigment in the absence of light. Pigment may darken or be enhanced when colonies are exposed to light.
References in periodicals archive ?
obuense, first described as a scotochromogenic RGM species isolated primarily from soil >40 years ago in Obu, Japan, is a catalase-positive, peroxidase-negative bacillus that can degrade salicylates, forming a black product (4,5).
Randall, "A mutant of a scotochromogenic Mycobacterium detected by colony morphology and lipid studies," Journal of Bacteriology, vol.
Four months after the specimen was collected, the organism in the PD fluid was identified at an outside laboratory as a scotochromogenic Mycobacterium with susceptibilities to all antibacterial agents tested.
yongonense noted that it has a distinct rpoB sequence (1), identical to that of a distantly related scotochromogenic species, M.
A scotochromogenic, rapidly growing strain was isolated in 2012 from respiratory specimens of an HIV-positive 44-year-old Iranian man with chronic pulmonary disease.
To the Editor: Mycobacterium shigaense is a novel, slow-growing, scotochromogenic mycobacterium (1), initially reported in 2012 as an opportunistic pathogen isolated from skin biopsy samples from a patient with a history of Hodgkin disease and severe cellular immunodeficiency.
avium DNA was negative), and routine cultures for mycobacteria yielded unidentified scotochromogenic mycobacterium.
A new species of rapidly growing scotochromogenic mycobacteria, Mycobacterium neoaurum.
Data from an extended panel of biochemical and cultural tests for conventional identification have not been reported; however, the appearance of a scotochromogenic pale yellow pigment with growth at 45[degrees]C and a negative 3-day arylsulfatase test are in full agreement with our present and previous findings (7).