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Seasonal allergic conjunctivitis induced by Japanese pear pollen
S Yanagisawa1, Y Nagaki, S Hiraki
1Department of Ophthalmology, Toyama Medical and Pharmaceutical University, Japan.
Purpose:
To evaluate the ocular findings in patients with Japanese pear (Pyrus pyrifolia Nakai) pollinosis.
Methods:
Twenty-two farmers working on artificial pollination in Japanese pear orchards were examined for ocular itching, conjunctival conditions, presence of eosinophils in the conjunctival specimen, and nasal symptoms. Serum IgE antibody to Japanese pear pollen was determined in 16 farmers.
Results:
Of the 22 subjects, 3 (Nos. 3, 4, and 13) exhibited ocular itching, conjunctival hyperemia, eosinophils in the conjunctival specimen, and positive serum IgE antibodies to Japanese pear pollen. In these patients, the conjunctivitis disappeared after treatment with topical cromoglycate.
Conclusion:
The present study demonstrated that seasonal allergic conjunctivitis may be induced by Japanese pear pollen (entomophilous flower pollen).