Occupational Asthma Reference
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Sherson D, Nielsen AD, Mortz CG, Vestergaard L, Brandt LPA, Jørs E, Bælum J,
Occupational rhinoconjunctivitis caused by the common indoor plant, Hoya compacta,
Occup Med,
2017;67:490-492,https://doi.org/10.1093/occmed/kqx095
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(Plain text:
Sherson D, Nielsen AD, Mortz CG, Vestergaard L, Brandt LPA, Jors E, Baelum J,
Occupational rhinoconjunctivitis caused by the common indoor plant, Hoya compacta,
Occup Med)
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Keywords: OA, OR, challenge, new cause, Denmark, Hoya compacta, rhinoconjunctivitis, horticulture
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Abstract
Background
Allergic reactions to the common house plant Hoya compacta (HC) have not previously been described.
Aims
To confirm HC as the cause of rhinoconjunctivitis in three horticultural workers.
Methods
Greenhouse working conditions were reproduced in our challenge chamber.
Results
All three cases developed rhinoconjunctivitis when working with HC plants. A control challenge was performed in two cases with iceberg lettuce causing no symptoms. Nasal volume measured by acoustic rhinometry (AR) fell after all three active challenges, but also after one of the control challenges.
Conclusions
Our study confirms that HC may cause occupational rhinoconjunctivitis and asthma through a Type I hypersensitivity reaction. Specific inhalation challenges, nasal nitric oxide measurement and AR may be useful additional tools in supporting such diagnoses for occupational physicians to consider.
Full Text
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Comments
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Although not stated in the abstract, one of the three had occupational asthma with a positive asthmatic response to the nasal challenge and NSBR
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