Tuberculin, mammalian, human isolates, intradermic is prepared from culture filtrates of Mycobacterium tuberculosis (strain Pn. C.
and Dt) which are heat inactivated and concentrated to 40% of their original volume by evaporation. The cultures are grown on a
synthetic media and tested in accordance with U.S.D.A. requirements. Caution: This product contains total and TCA precipitable
nitrogen levels below those specified in title 9, CFR part 113.406. However, present levels are approved. Dilution prior to use is
not recommended.