| nonphotochromogen |
a microorganism that does not produce pigment in the presence of light. The term is specifically applied to mycobacteria that do not produce carotenoid pigmentation; included in this group is the common pathogen Mycobacterium aviumintracellulare.
Ãâó: www.mercksource.com/pp/us/cns/cns_health_library.j...
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