larva

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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.

lar·va

, pl.

lar·vae

(lar'vă, lar'vē),
1. The wormlike developmental stage or stages of an insect or helminth that are markedly different from the adult and undergo subsequent metamorphosis; a grub, maggot, or caterpillar.
2. The second stage in the life cycle of a tick; the stage that hatches from the egg and, following engorgement, molts into the nymph.
3. The young of fishes or amphibians that often differ in appearance from the adult.
[L. a mask]

larva

/lar·va/ (lahr´vah) pl. lar´vae   [L.] an independent, motile, sometimes feeding, developmental stage in the life history of an animal.
larva cur´rens  a variant of larva migrans caused by Strongyloides stercoralis, in which the progression of the linear lesion is much more rapid.
cutaneous larva migrans , larva mi´grans creeping eruption; a convoluted threadlike pruritic, erythematous, papular or vesicular skin eruption that appears to migrate, caused by burrowing beneath the skin of roundworm larvae, particularly Ancylostoma larvae . Also applied to similar lesions caused by other parasites.
ocular larva migrans  infection of the eye with larvae of 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 of nematode larvae in human tissue other than skin; commonly caused by the larvae of Toxocara canis or T. cati, which do not complete their life cycle in humans.

larva

(lär′və)
n. pl. lar·vae (-vē) or lar·vas
1.
a. The newly hatched, wingless, often wormlike form of many insects, developing into a pupa in species that undergo complete metamorphosis.
b. The six-legged immature form of a tick or mite.
2. The newly hatched, earliest form of any of various animals that undergo metamorphosis, differing markedly in appearance from the adult.

lar′val adj.

larva

[lär′və] pl. larvae
Etymology: L, specter
the early immature form of an animal, which undergoes metamorphosis to an adult form. It is one of the growth stages for some insects; the state between the egg and the pupolarval stage is the feeding stage in the growth process. larval, adj.

lar·va

, pl. larvae (lahr'vă, -vē)
1. Developmental stage or stages of an insect or helminth.
2. The second stage in the life cycle of a tick; the stage in which it hatches from the egg and, following engorgement, molts into the nymph.
3. The young of fishes or amphibians that often differ in appearance from the adult.
[L. a mask]

larva

(pl. larvae) the preadult form of many animals that is usually morphologically different from the adult, and which in many cases takes up the larger part of the life history. Usually the larva is not sexually mature, but in cases of PAEDOGENESIS, of which the AXOLOTL is an example, breeding may take place at this stage. Often the larva is a dispersal phase, as in many marine invertebrates where larvae occur in the PLANKTON and usually the larva feeds in a different way from the adult and does not compete with it.

Larva

The immature, early form of an organism that at birth or hatching is not like its parent and has to undergo metamorphosis before assuming adult features.

larva

an independent, immature stage in a life cycle in which the stage is unlike the parent and must undergo changes in form and size to reach the adult stage. There may be one or several, three is common, larval stages in the one life cycle. In fish larvae are also called fry.

larva currens
a variant of larva migrans caused by Strongyloides stercoralis, in which the linear progress of the lesions is much more rapid.
cutaneous larva migrans
creeping eruption; a convoluted, thread-like skin eruption in humans and other species which appears to migrate; caused by the burrowing beneath the skin of roundworm larvae, particularly Ancylostoma, Strongyloides and Gnathostoma spp. A. braziliense, A. caninum, B. phlebotomum can cause the disease.
ocular larva migrans
infection of the eye with the 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 of larvae of animal nematodes in human tissues other than skin, commonly caused by larvae of the roundworms Toxocara canis and T. cati.
References in periodicals archive ?
When subjected to a stress situation such as the continual destruction of the trap, the antlion larva can react by relocating or reducing the size of their traps, or decreasing their respiratory rate during the ambush (Eitz, 1997).
As for mortality rate, it was expected that the constant rebuilding of the trap would increase this parameter since the larva would use more energy for the maintenance of the funnel.
Therefore, the development condition of the larva will be responsible for the characteristics of the adult.
Thus, the reproductive success of adults depends on the performance of the larva, which should build their traps in stable environments that allow maintenance and and the same time success in capturing prey.
2- Avaliação de erros na medida dos comprimentos total e padrão, pelo encolhimento proporcionado pelo fixador formalina a 10%: Para este experimento, foram utilizadas 51 larvas com sete dias de vida, recém-retiradas dos aquários (02/02/2006), as quais foram medidas com auxílio de um paquímetro, com precisão de 0,02 mm.
3- Comparação da influência de duas formas de secagem das larvas na obtenção da biomassa: Este experimento foi conduzido com larvas com sete dias de vida (02/02/2006) e larvas com 23 dias (18/02/2006).
Para verificar o efeito do tamanho e do agrupamento das larvas na precisão de medições foram realizados dois testes.
O primeiro experimento foi conduzido com larvas com 23 dias (18/02/2006).
Las larvas presentaron un unico periodo diario de busqueda de alimento, que se inicia a las 17hr 56min (17hr 50min guion 18hr 05min) y dura 90min y 36s (74min-105min).
Las larvas siguieron hasta el nuevo local de nidificacion, generalmente, en la base de las hojas de las respectivas plantas.
Al avanzar sobre una hoja inexplorada, las larvas deambulan y frecuentemente la primera se devuelve y es substituida.
Observations on the adhesive apparatus and the function of the ilio-colon ring in the living larva of amphioxus in the growth period.