Table 4.
Calculations of LD50.
| Challenge dose (CFU) | Dead chicks (n)/injected chicks (n) | |
|---|---|---|
| DE458 | DE458Δphi458 | |
| 1 × 108 | 8/8 | 8/8 |
| 1 × 107 | 7/8 | 8/8 |
| 1 × 106 | 4/8 | 6/8 |
| 1 × 105 | 2/8 | 5/8 |
| 1 × 104 | 1/8 | 2/8 |
| 1 × 103 | 0/8 | 0/8 |
| LD50 | 1.8 × 106 CFU | 1.3 × 105 CFU |
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.