unsheathed microfilaria

importer/temp
[: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

importer/temp
[: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

importer/temp
[: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\".

Brugia post-infection L3

importer/temp
[:life-stage/id "WBls:0000099"] :life-stage/definition Derived from the host after reintroduction by vector feeding or manual inoculation\; these piL3 samples are often-should be conditioned by age (hours or days post-infection).

Brugia L3i

importer/temp
[:life-stage/id "WBls:0000098"] :life-stage/definition Also known as infective L3, or iL3\; i.e. isolated from the vector salivary glands\; these samples may-should be conditioned by age, which is usually counted in days from the blood meal.

Brugia L4

importer/temp
[:life-stage/id "WBls:0000082"] :life-stage/definition The fourth stage larva. Should be conditioned by days post infection\; as moulting is not synchronous, some samples are defined as L3\/L4, indicating a mix of individuals as late L3, moulting, and early L4.

Brugia young adult

importer/temp
[:life-stage/id "WBls:0000100"] :life-stage/definition The animals have a significant \"prepatent\" period in the host, where they have moulted to adults but not yet started producing eggs or sperm\; this stage is usually-should be conditioned by days post infection, with day 26 to approximately day 60 being the \"young adult\" in most systems - but note that the speed of development is different in different host genotypes.

protoscolex stage

importer/temp
[: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.