Anisakis simplex: sensitization and clinical allergyDaschner, Alvaroa; Pascual, Cristina-YolandabCurrent Opinion in Allergy and Clinical Immunology: June 2005 - Volume 5 - Issue 3 - p 281–285 doi: 10.1097/01.all.0000168795.12701.fd Food allergy Abstract Author Information Purpose of review Whereas gastric anisakiasis has been known for several decades, the implications of Anisakis simplex-related allergic disorders had not been thoroughly studied until the late 1990s. This article reviews recent knowledge of allergic disorders ascribed to A. simplex contact or parasitism. Recent findings Gastroallergic anisakiasis describes an acute hypersensitivity reaction emerging in the context of an acute parasitism by the nematode A. simplex. But other frequent allergic disorders like chronic urticaria are now being studied for a possible relationship with A. simplex parasitism. In recent investigations, non-IgE mediated mechanisms, such as the involvement of other immunoglobulin isotypes (IgG4), or non-immunological events are discussed. Summary The experience of the last several years shows that allergic hypersensitivity symptoms in gastroallergic anisakiasis are clinical events accompanying a wide range of immunologic reactions as a host response against a ubiquitous parasite. The discussed and reviewed studies should motivate allergists around the world to search for this entity. Further studies in the field of allergy could benefit from the experience of this peculiar food-related disorder. aDepartment of Allergy, La Princesa University Hospital bDepartment of Allergy, La Paz University Hospital, Madrid, Spain Correspondence to Alvaro Daschner, Sección de Alergia. Hospital Universitario de la Princesa, C/ Diego de León 62, 28006-Madrid, Spain E-mail: firstname.lastname@example.org © 2005 Lippincott Williams & Wilkins, Inc.