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 ?
Given that the larvae Myrmeleon brasiliensis (Navas, 1914) select protected sites to build their traps and that trap maintenance has a high energy cost (Lima and Faria, 2007), we expected that constant maintenance and reconstruction of the trap would negatively affect larval development and the adult emergency conditions since the larvae would cease to accumulate the energy resources required for their full development.
litura larvae per plant was changed entirely in all five selected localities of Punjab due to change in weather conditions.
To test the effect of food availability on cannibalism, Drosophila melanogaster (Meigen, 1830) larvae were offered as prey.
In addition, larvae released from eggs that developed at warm temperatures contain higher energy reserves than those released from eggs at cold temperatures (Sasaki et al.
Planktotrophic echinoid larvae (echinoplutei) are provided with limited maternal investment and rely heavily on exogenous resources (e.
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.
In flow-through systems, larvae can receive a constant and optimal amount of algae, which does not occur in a batch system where there is higher mortality of microalgae, thus favoring bacteria growth in larviculture tanks (ANDERSEN et al.
Also, in some cases, viable eggs and yolk-sac larvae were placed in a rearing tray (30 X 18 cm) nested in a 76 liters aquarium with a flow through screen in the same system as the adults.
Six replications of 46 individual Merlot clusters were inoculated with five live larvae of L.
While these data provide support for the hypothesis that larvae freefall from canopies to forest floors, an alternative explanation for this phenomenon may be that 5th instar larvae are disproportionately dislodged from the canopy and subsequently recorded by observers.
University of Virginia researchers have found that the very simple eyes of fruit fly larvae, with only 24 total photoreceptors (the human eye contains more than 125 million), provide just enough light or visual input to allow the animal's relatively large brain to assemble that input into images.