The parasite secretes enzymes that break down the skin's protein to enable penetration of the cercarial head through the skin.    From Wordnik.com.  [Sun.Star Network Online - Your Source of Philippine Community News] Reference

The tantalizingly ends of the south seas captiva tusker were unwontedly basidiosporous and cercarial with cewa and uncorrectable to the anthropocentricity trillium.    From Wordnik.com.  [Rational Review] Reference

FACTOID: Anyone who swims in freshwater lakes in the north-central part of the United States may be familiar with a rash called swimmer’s itch cercarial dermatitis, caused by an allergic reaction to several parasites.    From Wordnik.com.  [You Raising Your Child] Reference

cercarial dermatitis, 226.    From Wordnik.com.  [You Raising Your Child] Reference