Abstract
The first author is allergic to skin contact with mushrooms of Suillus americanus, S. granulatus, S. grevillei, S. luteus, or S. neoalbidipes. Symptoms develop between one and two days after contact and last for approximately a week, disappearing completely without treatment. Symptoms consist of reddening, swelling, and itching, at the sites of contact with pileus cuticle mucilage of all five species. Pore layer tissues (tested for S. americanus and S. luteus) also produced strong reactions, as did pileus trama (tested for S. luteus). Spores from spore prints (tested for S. americanus and S. luteus) produced no reaction. The reaction can be avoided by wearing gloves when handling allergic species and by washing hands promptly after working with these species. Similar cases, reported from North America, Europe, and Russia, involve Agaricus, Boletus, Lactarius, Paxillus, Ramaria, and Suillus species. Several cases involve allergy to multiple species or genera. Symptom severity varies, presumably with intensity of exposure. In one case, symptoms were renewed following ingestion. Most cases demonstrate delayed allergic contact sensitivity.
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