1/5. Contact dermatitis from propolis.Two patients with contact dermatitis due to the natural product propolis (bee glue) are reported. They presented perioral eczema and stomatitis which were recalcitrant until propolis was considered as the cause. patch tests with propolis preparations were positive in both patients, and, furthermore, in the second patient the lesions relapsed after provocation tests. European standard patch test including balsam of peru were negative. The complexity of propolis, its supposed anti-inflammatory effect due to flavonoids, and the sensitizing agents originating mainly from the poplar trees are discussed together with the cross-sensitization to balsam of peru. Contact dermatitis due to propolis should be considered in unexplained eczemas, mainly perioral but also in other areas, as propolis preparations are available also as ointments and cosmetic creams.- - - - - - - - - - ranking = 1keywords = tree (Clic here for more details about this article) |
2/5. Contact dermatitis from radiata pine.Sawdust from radiata pine trees which are grown extensively throughout south australia causes various forms of contact dermatitis. The various forms are described in nine cases which illustrate that the early diagnosis of industrial dermatitis is necessary to prevent the condition from becoming chronic. A chance association between colophony in radiata pine sawdust and colophony in adhesive plaster, which caused contact dermatitis when used in patch testing, led to the discovery of these cases.- - - - - - - - - - ranking = 1keywords = tree (Clic here for more details about this article) |
3/5. Contact urticaria and rhinitis from latex surgical gloves.latex used in the manufacture of surgical gloves should be included in a list of allergens. It is found in the tree hevea braziliensis. For approximately the last year, minutes after using surgical gloves, a female doctor had severe pruritus followed by a rash and angio-oedema of the contact areas. During the last 4 months, on opening the glove-bag, she experienced severe rhinitis and respiratory distress. The symptoms ceased in 1 h. Standard patch tests and with substances used in the manufacture of rubber were negative. Prick tests with glove and natural latex were strongly positive. The presence of specific IgE against natural latex was demonstrated by means of a histamine release assay as well as by immunoenzymatic methods. The antigen seems to have a MW higher than 30,000 d and is trypsin-sensitive. These facts suggest that the allergen could be a protein present in the "crude natural latex".- - - - - - - - - - ranking = 1keywords = tree (Clic here for more details about this article) |
4/5. Contact allergy to Manilla resin. Nomenclature and physico-chemistry of Manilla, kauri, damar and copal resins.16 cases of allergic eczema from a resin used in a surgical adhesive (Alphacopal) are described. Because of the extreme confusion regarding the nomenclature and origin of the resins called copals and damars, this report attempts to give a terminological, botanical, physico-chemical and allergological restatement of this problem. Copals and damars are produced by trees belonging to the Araucariaceae, Caesalpiniaceae, dipterocarpaceae and burseraceae families. We suggest that the word "copal" be reserved for the resins of the Caesalpiniaceae and that of "damar" for the resins of the dipterocarpaceae. The resins of the Araucariaceae are special products that may be called Manilla resin and kauri resin, which are relatively different from each other. As far as the soft resins of the burseraceae are concerned, it would be appropriate to use the word "elemi". The component resin of the surgical adhesive implicated (Alphacopal) is a Manilla resin, produced by a variety of Agathis dammara (Lamb.) Rich., native to the philippines. We suggest 3 allergen screening series. Finally 2 pseudo-cross-sensitivities are mentioned.- - - - - - - - - - ranking = 1keywords = tree (Clic here for more details about this article) |
5/5. Mini-epidemic of contact dermatitis from ginkgo tree fruit (ginkgo biloba L.).3 cases of contact dermatitis from ginkgo fruit are reported. Swelling of the prepuce can be the only clinical sign of intolerance, as was observed in 1 case. Diagnosis of contact dermatitis to ginkgo fruit should be made in cities where female ginkgo trees grow, in Chinese, Japanese and South-East Asian subjects, who are aware of the ginkgo nut's culinary qualities within the fruit, as well as in children who play with the fallen fruits as "marbles".- - - - - - - - - - ranking = 5keywords = tree (Clic here for more details about this article) |