Mycobacterium Tuberculosis Biomarker
Neutral-red is a marker of Mycobacterium tuberculosis virulence
Published in TB and Outbreaks Week, April 18th, 2006
According to a study from Spain, "Searching for virulence marking tests for Mycobacterium tuberculosis, Dubos and Middlebrook reported in 1948 that in an alkaline aqueous solution of neutral-red, the cells of the virulent H37Rv M. tuberculosis strain fixed the dye and became red in color, whereas the cells of the avirulent H37Ra M. tuberculosis strain remained unstained.
"In the 1950 and 1960s, fresh isolates of M. tuberculosis were tested for this neutral-red cytochemical reaction and it was reported that they were neutral-red positive, whereas other...
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