It appears to be a "standard" for measuring the efficacy of anti-anthrax materials, or for other measurement of bacteria.
On the other hand, the particular strain of the strain of the strain is the same, and that gets limited down to a half dozen to a dozen places.
Knowing who produced the anthrax does not tell you who used it as a weapon. That's because this particular stuff could have been stolen over the last 10 years - according to the records!
Not true. The virulent strain is probably in fewer than 10 labs.