Fig. 6.

Kaplan–Meier survival curves of mice intoxicated with ricin and subjected to post-exposure treatment. Mice were intoxicated intranasally with ricin (7 μg/kg) and subjected to various treatments as indicated. Animals were observed for a 2-week period after ricin challenge. The various treatments were commenced at 24 h post exposure and included α-ricin antibodies (Ab), doxycycline (dox), or dexamethasone (dex), or their combinations, as indicated within the figure (n = 29–31). Curves corresponding to the “untreated” and “Ab” groups are those displayed in Fig. 1.