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Acute Intestinal Anisakiasis in Spain: a Fourth-stage Anisakis simplex Larva Rosales, José; Mascaró, Carmen; Fernandez, Carolina; Luque, Francisco; Moreno, Manuel Sanchez; Parras, Luis; Cosano, Antonio & Muñoz, Jose Ramón Abstract A case of acute intestinal anisakiasis has been reported; a nematode larva being found in the submucosa of the ileum of a woman in Jaén (Spain). The source of infection was the ingestion of raw Engraulis encrasicholus. On the basis of its morphology, the worm has been identified as a fourth-stage larva of Anisakis simplex. In Spain, this is the ninth report of human anisakiasis and also probably the first case of anisakiasis caused by a fourth-stage larva of A. simplex. Keywords Anisakis simplex - anisakiasis - Engraulis encrasicholus - Spain

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