Larvae


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larva

 [lahr´vah] (pl. lar´vae) (L.)
1. an independent, immature stage in the life cycle of an animal, in which it is markedly unlike the parent and must undergo changes in form and size to reach the adult stage.
2. something that resembles such an immature animal.
larva cur´rens a rapidly progressive creeping eruption caused by autoinoculation of larvae of Strongyloides stercoralis that migrate to and mature at the anus in intestinal infections with the parasite.
cutaneous larva mi´grans (larva mi´grans) a convoluted threadlike skin eruption that appears to migrate, caused by the burrowing beneath the skin of roundworm larvae, particularly of the species Ancylostoma; similar lesions are caused by the larvae of botflies. Called also creeping eruption.
ocular larva migrans infection of the eye with larvae of the roundworm Toxocara canis or T. cati, which may lodge in the choroid or retina or migrate to the vitreous; on the death of the larvae, a granulomatous inflammation occurs, the lesion varying from a translucent elevation of the retina to massive retinal detachment and pseudoglioma.
visceral larva migrans a condition due to prolonged migration by the skin larvae of animal nematodes in human tissue other than skin; commonly caused by larvae of the roundworms Toxocara canis and T. cati.

larva

(lar'va) ('ve?, 'vi?) plural.larvae [L. larva, a ghost, mask]
1. General term applied to the developing form of an insect after it has emerged from the egg and before it transforms into a pupa, from which it emerges as an adult.
2. The immature forms of other invertebrates such as worms. larval (lar'val), adjective

larva currens

A type of larva migrans. The organism, Strongyloides stercoralis, travels subcutaneously at the rate of about 10 cm an hour rather than at the slow rate of larva migrans.

cutaneous larva migrans

A skin lesion characterized by a tortuous elevated red line that progresses at one end while fading out at the other. It is caused by the subcutaneous migration of the larvae of certain nematodes, esp. Ancylostoma braziliense and A. caninum, that occur as parasitic infections in humans.

visceral larva migrans

Toxocariasis.

Larvae

Immature forms of certain worms.
References in periodicals archive ?
Rawalpindi Cantonment Board (RCB) under anti-dengue drive had inspected 2948 houses and removed dengue larvae from 73 points.
alexandri larvae, from the same batch, with 1.28 [+ or -] 0.05 cm and 29 [+ or -] 3.0 mg, of total length and weight, respectively were distributed with 5 L-aquariums, at density of 7 larvae [L.sup.-1] (40 larvae [aquarium.sup.-1]).
She said under-construction buildings should be checked thoroughly as dengue larvae are mostly found in such premises.
Dr Zeeshan called upon the residents to keep an eye on junkyards, schools and under construction buildings which leads to the spread of dengue larvae and to leave no place wet or with stagnant water.
There are thus contradictory observations in previous studies regarding food consumption and crop damage by baculovirus infected larvae as compared to healthy larvae.
The administration began addressing the problem in October 2017, when it revised policies to introduce exemplary standards for breeding and inspecting larvae for food waste disposal.
The eruption starts with an erythematous, pruritic papule at the site of entrance of larvae. The creeping activity of these parasites produce migratory thread like lesion.
brasiliensis larvae were collected from a permanent protection area (20[degrees]26'25"S, 55[degrees]39'21"W) belonging to the Universidade Estadual do Mato Grosso do Sul in the municipality of Aquidauana, in the State of Mato Grosso do Sul, Brazil.
The life cycle of lobster has a long-pelagic phase during which larvae are exposed to currents that may affect, as they reach stage IV, their distribution upon settlement.
Planktotrophic echinoid larvae (echinoplutei) are provided with limited maternal investment and rely heavily on exogenous resources (e.g., phytoplankton) for growth to competency for metamorphosis.
TAPEWORMS: Humans can become infected by tapeworms, but it takes some doing; just as with dogs, a human has to ingest a flea that is infected with tapeworm larvae in order to become infected himself.
Robert and Gerard (1999) report that to improve techniques of mollusc larviculture, it is important to develop systems with a continuous supply of food in the cultivation of larvae and post larvae, as this is one of the most promising methods.