unsheathed microfilaria

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[:life-stage/id "WBls:0000666"] :life-stage/definition A microfilaria life stage in which larvae are not sheathed by a membrane thought to be derived from the vitelline membrane.

sheathed microfilaria

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[:life-stage/id "WBls:0000110"] :life-stage/definition A microfilaria life stage in which larvae are surrounded by a membrane thought to be derived from the vitelline membrane, hence \"sheathed\".

Brugia sheathed microfilaria

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[:life-stage/id "WBls:0000077"] :life-stage/definition A Brugia microfilaria life stage in which larvae are surrounded by a membrane thought to be derived from the vitelline membrane, hence \"sheathed\".

sporocyst

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[:life-stage/id "WBls:0000707"] :life-stage/definition 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.

schistosomulum

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[:life-stage/id "WBls:0000709"] :life-stage/definition 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.

protoscolex stage

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[:life-stage/id "WBls:0000715"] :life-stage/definition An infective larval stage of cestodes which develops from the hydatid cyst. The stage begins when a clustering of cells emerge from the germinal layer of hydatid cysts. The buds elongate and the cells at their bases seem to diminish in number. Very early on a furrow appears in the elongated buds, delimiting anterior (scolex) and caudal (body) regions. Hooks are the first fully-differentiated structures formed at the apical region of the nascent scolex. A cone can later be seen at the center of the hooks, the body is expanded and a structured neck is evident between the scolex and the body. During protoscolex development this parasitic form remains attached to the germinative layer through a stalk. When fully differentiated, the stalk is cut off and the infective protoscolex is now free in the hydatid fluid. This stage ends when the protoscolex attaches, via the scolex, to the host intestinal tissue and begins to develop into a adult.

worm life stage

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[:life-stage/id "WBls:0000075"] :life-stage/definition A developemental life stage of a worm

Digenean life stage

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[:life-stage/id "WBls:0000711"] :life-stage/definition A developmental stage of a Digenean (fluke).

Strongyloides post parasitic L1

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[:life-stage/id "WBls:0000794"] :life-stage/definition Strongyloides L1 larval stage that is the progeny of a parasitic adult female as a part of a of parasitic life-cycle.

Strongyloides infective L3

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[:life-stage/id "WBls:0000680"] :life-stage/definition Strongyloides infective stage L3 larval stage. This stage can develop as a part of a free-living life-cycle, or from a parasitic, parthenogenic female stage.