PLXNA2 and cyst: These results suggest that ENO immunization induces strong IgG1 and IgG2b responses detectable in both plasma and mucosal secretions, while OCT is a weaker inducer of these responses in plasma and not at all in mucosal secretions, perhaps providing a partial explanation for the differences in the reduction of trophozoite vs cyst numbers that was seen for ENO and OCT (see Fig 3).