Kim YK, Son JW, Kim HY et al, New occupational allergen in citrus farmers: citrus red mite (Panonychus citri), Ann Allergy Asthma Immunol, 1999;82:223-228,

BOHRF Original Authors' Main Conclusions

The original authors' main conclusions are taken from Abstract, Results and Discussion. They are decided upon by the authors of the BOHRF occupational asthma guidelines and form part of the guidelines.

The purpose of this study was to evaluate clinical and immunologic characteristics of citrus red mite (CRM, Panonychus citri)-induced occupational asthma. 16 cases of CRM-induced occupational asthma among farmers cultivating citrus fruits were encountered and asthmatic attacks corresponded closely with their work on citrus farms. The mean duration of the latent period was 12.9 (range 7 to 20) years. Fifteen of the 16 complained of recurrent nasal symptoms, which had developed at an earlier time than the asthmatic symptoms. They showed strong positive reactions to CRM extract on skin prick test and had high serum specific IgE antibody against CRM. Skin prick test with common inhalant allergens revealed that 10 had an isolated positive response to CRM with negative results to common inhalant allergens in their environment.

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