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Immediate allergic and nonallergic reactions to Christmas and Easter cacti
Background: Occupational exposure to Christmas cacti has been reported as a cause of type I allergy. Therefore, the prevalence of immediate‐type mucosal and skin reactions related to cactus exposure was studied in 103 employees in a cactus nursery. Methods: The study was based on a questionnaire fol...
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Published in: | Allergy (Copenhagen) 1999-05, Vol.54 (5), p.511-516 |
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Main Authors: | , , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Background: Occupational exposure to Christmas cacti has been reported as a cause of type I allergy. Therefore, the prevalence of immediate‐type mucosal and skin reactions related to cactus exposure was studied in 103 employees in a cactus nursery.
Methods: The study was based on a questionnaire followed by clinical examination, skin prick tests (SPT) with standard inhalant allergens and cacti, and a histamine‐release test (HRT/Refix) using fresh cactus extracts as elicitor.
Results: The questionnaire was answered by 84 (82%) of the nursery employees, and 63 (61%) were interviewed and skin prick tested; 58 of these were tested with HRT/Refix. Furthermore, 22 healthy controls were included and tested in vivo and in vitro. Cactus‐related contact urticaria and/or rhinoconjunctivitis were reported by 37% of the cactus workers. Based on a combination of positive history, positive SPT, and positive HRT/Refix to cactus, 8% of the cactus workers were allergic to cacti. No noncactus workers or controls were allergic to cacti by these criteria. Testing with fresh cactus material elicited positive SPT and negative HRT/Refix in 27 nursery workers and controls, of whom 12 had immediate‐type skin and mucosal symptoms.
Conclusions: Christmas and Easter cacti seemed to be able to induce contact urticaria and rhinoconjunctivitis on both an immunologic and a nonimmunologic basis. Personal atopy was associated with positive reactions to cacti. |
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ISSN: | 0105-4538 1398-9995 |
DOI: | 10.1034/j.1398-9995.1999.00016.x |