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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.
Miller-Keane Encyclopedia and Dictionary of Medicine, Nursing, and Allied Health, Seventh Edition. © 2003 by Saunders, an imprint of Elsevier, Inc. All rights reserved.
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
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 migransToxocariasis.
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Immature forms of certain worms.
Mentioned in: Cutaneous Larva Migrans
Gale Encyclopedia of Medicine. Copyright 2008 The Gale Group, Inc. All rights reserved.