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| Strain | LD50 a | LD50 Confidence Limits |
| Wild type BcATCC14579 | 1.8×103 | 3.1×102–3.3×103 |
| Δasb | 3.4×103 | 1.2×103–5.6×103 |
| ΔentA | 1.0×104 | 8.8×103–1.2×104 |
| ΔentAΩentA | 6.4×103 | 4.7×103–8.2×103 |
| ΔentAΔasb | 1.2×104 | 8.5×103–1.6×104 |
The 50% lethal doses, in number of colony forming units (cfu), were evaluated by Probit survival.
analysis (p<0.05).
