Guest guest Posted March 19, 2002 Report Share Posted March 19, 2002 Hi, I found another article in the March 2002 issue of Skin and Allergy News. Hope this is helpful! Matija Patch test for other natural substances Cross-Sensitivity Common in Tea Tree Oil Allergy Bruce Jancin Denver Bureau MUNICH — Patients with contact hypersensitivity to tea tree oil often have cross-sensitivity to other natural products, Dr. Eliska Dastychova reported at the 10th Congress of the European Academy of Dermatology and Venereology. Use of tea tree oil is growing both as a cosmetic ingredient and as a form of complementary and alternative medicine. So in patients with contact dermatitis that appears to be associated with tea tree oil, it's important to cast a wider net and search for cross sensitivities. And in patients with known contact hypersensitivity to several natural products, it's a good idea to also patch test for reactivity to tea tree oil, according to Dr. Dastychova, a dermatologist at Saint University Hospital in Brno, Czech Republic. She patch tested 106 eczema patients. Seventeen were regular users of tea tree oil, including 13 who used it to treat their eczema and 4 who used cosmetics containing tea tree oil. Contact hypersensitivity to tea tree oil was found in 12 of the 106 patients—but only 3 of those used tea tree oil, Dr. Dastychova said. The other nine included four patients with a history of previous and current sensitization to lavender oil, two who were sensitive to balsam of Peru, two with sensitization to calendula, and one patient with hypersensitivity to turpentine, she said. In a second study, she patch tested nine patients with allergic contact dermatitis attributed to the tea tree oil they had been using to treat various dermatoses. In addition to being patch test–positive to tea tree oil, all tested positive to other natural substances, Dr. Dastychova commented. Five were patch test–positive to pine oil and four to lavender oil. Sensitization to rosemary oil, eucalyptus oil, juniper oil, fragrance mix, or lemon was present in two patients each. One patient each was patch test–positive to camphor, balsam of Peru, colophony, calendula, and chamomile extract. Quote Link to comment Share on other sites More sharing options...
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