Ocular larva migrans is a rare inflammatory condition of the eye caused by local reactions to the larva of Toxocara species. These are roundworms which infest dogs and cats as their definitive hosts. Toxocara canis (T. cani), which infests dogs, is more commonly implicated than Toxocara cati (T. 27 февр. 2019 г.
What causes ocular larva migrans in humans?
Ocular larva migrans is typically caused by migration of Toxocara spp larvae through the choroidal and retinal vessels into the posterior segment of the eye, or occasionally through the optic nerve via the central nervous system [23, 24].
What helminth causes larva migrans syndrome or wandering larva syndrome?
Larva migrans syndrome (LMS) caused by Toxocara and Ascaris roundworms is generally believed to be more common in children, while a report from Japan suggests that it is more common in adults.
What causes larva currens?
Larva currens is an autoinfection caused by penetration of the perianal skin by infectious larvae as they are excreted in the feces. An urticarial band is the prominent primary lesion of cutaneous strongyloidiasis.
What is the most common cause of visceral larva migrans?
Toxocara canis is the most common cause of visceral larva migrans. Mature T canis worms live in the small intestines of dogs, their natural host. Heavily infected dogs can pass millions of eggs each day in their feces. Toxocara cati can also cause visceral larva migrans.
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