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A history of respiratory or other allergic symptoms during the Christmas season is occasionally obtained from allergic patients and can be related to exposure to conifers at home or in school. Incidence and mechanism of production of these symptoms were studied. Of 1657 allergic patients, respiratory and skin allergies to conifers occurred in 7%. This seasonal syndrome includes sneezing, wheezing and transitory skin rashes. The majority of patients develop their disease within 24 hours, but 15% experience symptoms after several days' delay. Mould and pollen studies were carried out in 10 test sites before, during and after tree placement in the home. Scrapings from pine and spruce bark yielded large numbers of Penicillium, Epicoccum and Alternaria, but these failed to become airborne. No significant alteration was discovered in the airborne fungi in houses when trees were present. Pollen studies showed release into air of weed, grass and tree pollens while Christmas trees were in the house. Oleoresins of the tree balsam are thought to be the most likely cause of the symptoms designated as Christmas tree allergy. 相似文献
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Andrew Sherrington 《Canadian Medical Association journal》1981,125(11):1209
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Mary V. Seeman 《Canadian Medical Association journal》2001,165(12):1625-1626
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Vince Hanlon 《Canadian Medical Association journal》2001,165(12):1647-1648
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CASTRO AL 《Journal of the American Medical Women's Association》1958,13(7):280-283
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C M Collins 《The Journal of the Florida Medical Association》1986,73(12):916-917
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S G Rees R R Holman R C Turner 《British medical journal (Clinical research ed.)》1985,291(6511):1764-1765
Twenty two normal subjects and 13 maturity onset diabetic patients completed an observational study with repeated weighing and fasting blood tests from one month before to one month after Christmas. Over the Christmas period in all subjects an increase in weight was observed (mean 0.8 (SD 0.1) kg, p less than 0.001), which was maintained through January. This may signify an average additional 6000 kcal ingested. By three to six days after Christmas a slight but significant increase in fasting plasma triglyceride (p less than 0.03) and cholesterol (p less than 0.02) concentrations occurred, with a subsequent rise in glycosylated haemoglobin concentration (p less than 0.001). This study is not likely to affect any future Christmas. 相似文献
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R.D. Atkinson 《Canadian Medical Association journal》1978,119(11):1269
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