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TABLE 2.

Correlation of individual ELISA titers with survival after vaccination with purified peak 1 BoNT/A(Hc)

Individual ELISA titera Survival (no. alive/total)b % Survival
≤100 6/42 14.3
400 17/25 68.0
≥1,600 82/83 98.8
a

Serum was bled from each mouse individually. Titer is the reciprocal of the highest dilution having an A405 of greater than 0.2 after correction for background. 

b

Mice were challenged with 100,000 i.p. LD50 of BoNT/A 21 days after the last vaccination.