Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Congruent relationship between the optical density at 600 nm of the NIFDC reference material and bacterial concentrations.
| Reference Material (RM) | Corresponding concentration of Y. pestis (× 108 cell mL−1) | Corresponding concentration of Brucella spp. (× 108 cell mL−1) | Corresponding concentration of B. anthracis (× 108 cell mL−1) |
|---|---|---|---|
| RM with low optical density | 4.3 | 18 | 0.4 |
| RM with Medium optical density | 6.2 | 25 | 0.55 |
| RM with high optical density | 8.4 | 34 | 0.72 |
