Life cycle of schistosomes
An overview of the life cycle of a schistosome and how they can cause swimmer's itch in humans.
Source
Boundless vets and curates high-quality, openly licensed content from around the Internet. This particular resource used the following sources:
"CDC - Cercarial Dermatitis - Biology."
http://www.cdc.gov/parasites/swimmersitch/biology.html
Centers for Disease Control and Prevention
Public domain.