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Spiruroid larva migrans

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spiruroid larva migrans

Extraintestinal migration by nematode larvae of the order spiruroidea, not adapted to maturation in the human intestine; caused chiefly by species of gnathostoma spinigerum and G. Hispidum in japan and Thailand, following ingestion of uncooked fish infected with encapsulated third-stage infective larvae, and possibly by ingestion of infected copepods (the first intermediate host) in contaminated drinking water; the anteriorly spined larvae produce serpiginous tunnels in the skin or may cause subcutaneous or pulmonary abscess, or may invade the eye or brain.