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TABLE 2.

LD50 of isogenic mutant strains

Strain LD50 (95% CI)a in:
Cirrhotic rats Control rats
H+C+ 2.5 × 106 (8.1 × 105–7.8 × 106) 7.9 × 106 (1.4 × 106–4.6 × 107)
H+C− 7.9 × 107 (1.4 × 107–4.0 × 108) 3.2 × 107 (1.1 × 107–9.3 × 107)
PLY− 7.9 × 107 (7.9 × 106–7.9 × 108) >7.9 × 107b
a

The results are expressed as the 50% lethal dose with 95% confidence intervals (CI) (as determined by the method of Litchfield and Wilcoxon [17]). 

b

No deaths recorded at any of the doses used.