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| Keywords: Cercarial LifeCycle.png Typically hosts of avian schistosomes are migratory water birds including shorebirds ducks and geese Adult worms are found in the blood vessels and produce eggs that are swallowed and passed in the feces On exposure to water the eggs hatch and liberate a ciliated miracidium that infects a suitable molluscan intermediate host The parasite develops in the intermediate host usually a certain species of snail to produce free-swimming cercariae that are released under appropriate conditions and penetrate the skin of the birds to complete the cycle Humans are inadvertent and inappropriate hosts; cercariae may penetrate the skin but do not develop further A number of species of dermatitis-producing cercariae have been described from both freshwater and saltwater environments and exposure to either type of cercariae will sensitize persons to both http //www dpd cdc gov/dpdx/HTML/CercarialDermatitis htm 2007-11-14 PD-USGov Check categories 2008 October 31 pl wikipedia Trichobilharzia_szidati Digenea Schistosomatidae Schistosome cercarial dermatitis Original upload log wikitable - - 2007-11-14 14 29 10 569 × 435 28886 bytes Filip em <nowiki> Typically hosts of avian schistosomes are migratory water birds including shorebirds ducks and geese Adult worms are found in the blood vessels and produce eggs that are swallowed and passed in the feces On exposure to </nowiki> CDC lifecycles Life cycles of trematodes | ||||
