Seasonal rhinitis in a cat sensitized to Japanese cedar (Cryptomeria japonica) pollen

A cat showing seasonal allergic symptoms of rhinitis was examined for react ivities to Japanese cedar (Cryptomeria japonica, CJ) pollen allergen by int radermal skin test (IDST), Prausnitz-Kustner (P-K) test, and lymphocyte bla stogenic response. In IDST for 26 common allergens, the cat showed a positi ve reaction to CJ pollen allergen. P-K test using CJ pollen allergen also s howed a positive reaction, indicating the presence of serum IgE specific to CJ pollen. In the lymphocyte blastogenic response, the stimulation index i n the presence of CJ pollen allergen was 2.4. These data suggested that the seasonal rhinitis observed in the cat was caused by the sen sitization to CJ pollen allergen.