Survival of TW08571-infected, Str-treated mice. (A) Percentages of survival of Str-treated mice infected with TW08571 and given daily injections, starting on D2PI, of PBS (black) or 15 μg Cip (red) (P, 0.0089 by the log rank [Mantel-Cox] test). (B) Percentages of survival of Str-treated mice infected with TW08571, given Cip starting on D2PI, and administered a tail vein injection of PBS (black), anti-CT (green), anti-Stx2 (blue), or anti-Stx1 (red) on D2PI. A significant difference was found between PBS and anti-Stx2 (P = 0.002) by the log rank (Mantel-Cox) test; the differences between all other treatments were nonsignificant.