Cross-reactivity of M. expansa antigen against different prepared hyper immune sera. Neg. rabb. serum negative rabbit serum, HIS-Monezia spp: Hyper immune serum raised against M. expensa, HIS-Fasciola spp: Hyper immune serum raised against Fasciola spp, HIS-H. contortus: Hyper immune serum raised against H. contortus, ctrl.pos. H. contortus: control positive serum of adult H. contortus, ctrl.neg. H. contortus: control negative serum of adult H. contortus