Table 1. Serum neutralization in mice challenged with Tityus serrulatus venom (TsV).

Groups 1 to 14 received amounts corresponding to 2 LD₅₀ of TsV that had been preincubated for 1 h at 37℃ with individual sheep serum (groups 1 to 12), PBS (group 13, negative control) or commercial anti-venom (group 14, positive control). Group 15 received only 200 µL of pooled sheep sera to verify any adverse events.