M. tuberculosis "Niacin Test"? (Clincal Micro)

[graham at biodec.wustl.edu]

Hello researchers,

Anyone have a protocol or reference to a "Niacin Test" for Mycobacterium 
tuberculosis? I see meniton of bichemical testing for extracellular 
nicotinic acid production but no procedures.

E mail most appreciated,

Thanks,

Jim
J. Graham PhD
Biology Department