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Clinical Characteristics and Pattern of Skin Test Reactivities in Shellfish Allergy Patients in Hong Kong

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Allergens from crustaceans and mollusks exhibit extensive cross-reactivity in vitro. However, the degree and pattern of crossreactivity between different shellfish species in vivo is still unclear. The objective of this study was to determine the clinical characteristics of shellfish allergic patients in Hong Kong and the pattern of skin test reactivities to the different species. This cohort study involves patients attending the allergy clinic of a large teaching hospital for suspected shellfish allergy. Each subject underwent skin-prick tests to eight species of shellfish and house-dust mites. Eighty-four consecutive patients were tested. Twenty-eight patients reported a history of severe anaphylaxis. Fourteen patients had no positive shellfish skin test and were excluded. There were 183 positive shellfish skin tests, with an average of 2.61 positive tests per subject. Ninety percent of subjects also had positive skin tests to house-dust mites. Overall, 65.7% of subjects had more than one positive skin test to shellfish. There were strong statistical associations between species belonging to the same order but also between some mollusks and crustaceans. We found a high degree of skin test cross-reactivity between different species of shellfish and between shellfish and house-dust mites. Therefore, patients with a history of shellfish allergy should be cautious with all types of shellfish.
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Document Type: Research Article

Publication date: July 1, 2004

More about this publication?
  • Allergy and Asthma Proceedings is a peer reviewed publication dedicated to distributing timely scientific research regarding advancements in the knowledge and practice of allergy, asthma and immunology. Its primary readership consists of allergists and pulmonologists.

    The goal of the Proceedings is to publish articles with a predominantly clinical focus which directly impact quality of care for patients with allergic disease and asthma and by having the potential to directly impact the quality of patient care. AAP welcomes the submission of original works including peer-reviewed original research and clinical trial results. Additionally, as the official journal of the Eastern Allergy Conference (EAC), AAP will publish content from EAC poster sessions as well as review articles derived from EAC lectures.

    Featured topics include asthma, rhinitis, sinusitis, food allergies, allergic skin diseases, diagnostic techniques, allergens, and treatment modalities. Published material includes peer-reviewed original research, clinical trials and review articles.

    Articles marked "F" offer free full text for personal noncommercial use only.

    The journal is indexed in Thomson Reuters Web of Science and Science Citation Index Expanded, plus the National Library of Medicine's PubMed service.
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