Figure 1.

Survival and dose-response analysis (LD₅₀) of orally administered ricin in mice: (A) dose-response (LD₅₀) of orally administered ricin in Balb/C mice. Data points from four studies. (B) Kaplan-Meier survival plot; (C) mean bodyweight changes as a percentage of their own weight at 9 a.m. on day 0; (D) mean accumulative scores of signs of ricin intoxication (Table S1); (E) mean occurrences of route-specific signs of ricin intoxication over the 14 days (swollen abdomens) following ricin oral gavage.