[Genetic analysis of the shedding pattern of Schistosoma mansoni cercariae by hybridization of species with early and late emission peaks].

The hybridization between Schistosomes (S. mansoni) with an early and a late shedding pattern of cercariae lead to heterozygotous cercariae whose shedding pattern is characterized by two peaks (early and late). These results demonstrate the genetic support of the shedding rhythm of cercariae and suggest the participation of the daughter sporocyst in the chronobiological phenomenon of cercarial shedding.