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Occupational Medicine 2006 56(1):63-66; doi:10.1093/occmed/kqi175
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R. M. Barraclough, Health & Safety Laboratory. © Crown Copyright 2005. Reproduced with the permission of the Controller of Her Majesty's Stationery Office.

CASE REPORT

Sensitization to king scallop (Pectin maximus) and queen scallop (Chlamys opercularis) proteins

R. M. Barraclough1, J. Walker1, N. Hamilton2, D. Fishwick1 and A. D. Curran1

1 Health & Safety Laboratory, Harpur Hill, Buxton SK17 9JN, UK
2 Health & Safety Executive, FOD, Belford House, Edinburgh, EH4 3UE, UK

Objective To report a case of occupational asthma and urticaria due to the queen scallop (Chlamys opercularis) and king scallop (Pectin maximus).

Background A 40-year-old female worked in a shellfish-processing plant, handling king and queen scallops for 5 years. At the time of investigation, she described a 2-year history of work-related respiratory symptoms.

Methods Serial peak expiratory flow rate readings were recorded and an OASYS study completed. A workplace visit was undertaken and specific immunoglobulin (IgE) radioallergosorbent (RAST) testing of scallop extracts was performed.

Results The OASYS study was consistent with occupational asthma. RAST testing demonstrated evidence of specific sensitization (IgE) to queen and king scallop. There was also some cross-reactivity observed with other shellfish (prawns and crabs).

Conclusion Workers exposed to aerosols from scallop species are at risk of occupational asthma and require effective respiratory health surveillance.

Keywords      IgE; occupational asthma; scallops; sensitization; shellfish

Correspondence to: R. M. Barraclough, Health & Safety Laboratory, Harpur Hill, Buxton SK17 9JN, UK. Tel: +0044 (0)1298 218447; fax: +0044 (0)1298 218471; e-mail: Richard.Barraclough{at}hsl.gov.uk


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