nonchromogenic


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non·chro·mo·gen·ic

(non'krō-mō-jen'ik)
Nonphotoreactive; pertains to lack of pigment production when colonies are exposed to light.

nonchromogenic

not producing colored pigments. Said of bacteria, e.g. nonchromogenic Mycobacterium spp.
References in periodicals archive ?
A bronchoalveolar lavage was performed; samples yielded in culture Pseudomonas aeruginosa and a nonchromogenic mycobacterium.
In screening, some lipoproteins were dissociated to water and oxygen by actions of cholesterol esterase/ oxidase and catalase to form a nonchromogenic product in step 1.
All isolates yielded smooth to greasy domed nonchromogenic colonies in culture (online Technical Appendix Figure, wwwnc.