WormMine: LifeStage WBls:0000711

• Definition: A developmental stage of a Digenean (fluke).
• Primary Identifier: WBls:0000711
• Public Name: Digenean life stage
• Remark: Digeneans include the Schistosomatidae (blood flukes).

0 Anatomy Terms

1 Contained In

Remark	Definition	Other Name	Public Name	Primary Identifier
	Any developmental stage in Platyhelminthes (flatworms).		Platyhelminthes life stage	WBls:0000704

0 Expression Clusters

0 Expression Patterns

0 Followed By

0 Preceded By

7 Sub Stages

Remark	Definition	Other Name	Public Name	Primary Identifier
	A dormant Digenean (fluke) life stage which occurs after cercariae are released from the intermediate snail host and encyst on vegetation until they are ingested by the definitive host.		metacercarium	WBls:0000720
	A tailless cercarium of Schistosoma sp, which resides in the definitive host. After penetration and spending a few days in the skin, schistosomula migrate to the lungs and enter the systemic circulation and are carried to the mesenteric vein of the host where they mature into adult schistosomes.		schistosomulum	WBls:0000709
	An infectious life-cycle stage, which can infect by direct skin penetration (e.g. Schistosoma sp.) or ingestion (e.g. Fasciola sp.). Cercariae develop in and emerge from the intermediate invertebrate (snail) host. In Schistosoma sp., the cercarium attaches to the skin of the definitive host and secretes proteolytic enzymes helping it to enter into cutaneous capillary vessel; upon the penetration the cercarium sheds its tail and transforms into a schistosomulum. In Fasciola sp., cercariae encyst on vegetation as dormant metacercariae until ingestion by the definitive host.		cercarium	WBls:0000708
	A sac-like secondary larval stage. The miracidium transforms into a primary (mother) sporocyst; germ cells within the primary sporocyst begin dividing to produce secondary (daughter) sporocysts, which migrate to the snail hepatopancreas; once at the hepatopancreas, germ cells within the secondary sporocyst begin to divide again, this time producing cercariae.		sporocyst	WBls:0000707
	Free-swimming larval stage. Once the egg is released into environment, the miracidium hatches immediately and starts swimming in search of an intermediate host. In Schistosoma mansoni this is a snail of species Biomphalaria.		miracidium	WBls:0000706
	A Digenean (fluke) life stage that occurs in the definitive host. The stage begins when the metacercariae excyst in the intestine of the host, and continues as the NEJs migrate through the liver parenchyma where they increase in size to juvenile flukes and then to mature adults.		newly excysted juveniles	WBls:0000718
	A Digenean (fluke) life stage that occurs in the definitive host. The stage begins when the newly excysted juveniles migrate through the liver parenchyma where they increase in size to become juvenile flukes. From here they migrate into the bile ducts, where they grow and develop into fully mature adults.		juvenile fluke	WBls:0000719