Protection level induced by immunization with rSm29 plus Freund’s adjuvant in Balb/c mice previously infected/treated animals.

aWorm burden recovered from mice immunization with one, two or three doses. For each vaccinated group: n = 10 mice. Comparison between total worm burden recoveredb or numbers of eggs per gram of intestinec from IT/rSm29 group and IT/Saline control group, which received the same number of immunization doses and were challenged with 100 S. mansoni LE strain cercariae. NS = not significant. ND = not determined. *Statistically significant (p<0.05) Protection level induced by immunization with rSm29 plus Freund’s adjuvant in Balb/c mice previously infected/treated animals.