Abstract A case of occupational dermatitis in a 65-year-old beekeeper is reported. A positive patch test with a mixture of balsams led to testing with beeswax from his own hives and with leaves and resins from poplar trees. These tests were also found strongly positive in accordance with earlier reports. Honeybees employ plant resins, including poplar and fir resins, in the construction of their combs; thus the contact between plant resin and beekeeper is established. A series of control tests made support the view that the cutaneous allergy to poplar resins encountered in the patient was of an allergic and not of a primary irritant nature. Finally a tentative explanation of the crossallergies between balsam of Peru and poplar resins found in the patient and reported in the literature is presented. References 1. Börlin, E.: Berufsekzeme bei Bienenzüchtern , Dermatologica , 94:109-121, 1947.Crossref 2. Brnobić, A.: Prilog Etiologiji Profesionalnog Ekzema Kod Pčelara , Rad Med Fak Zagreb 1-3:128-137, 1953. 3. Umansky, G.I.: Über eine professionelle Dermatitis, verursacht durch Bienenharz Propolis , Derm Wschr 98:177-180, 1934. 4. Schwartz, L., and Peck, S.M.: The Irritants in Adhesive Plaster , Public Health Rep 50:811-819, 1935.Crossref 5. Encyclopedia Americana , New York: Americana Corp., 1965, vol 3, p 4226. 6. Hjorth, N.: Routine Patch Tests , Trans St John Hosp Derm Soc 49:99-107, 1963. 7. Hjorth, N.: Eczematous Allergy to Balsam , Copenhagen: Munksgaard, 1961, pp 102-103, 140. 8. Hjorth, N., and Trolle-Lassen, C.: Skin Reactions to Ointment Bases , Trans St John Hosp Derm Soc 49:127-140, 1963. 9. Winkler, A.: Dermatitis durch Pappelharz , Derm Wschr 133:81-87, 1956. 10. British Universities Encyclopedia , 1933-1937, vol 3, p 22. 11. Fregert, S., and Rorsman, H.: Simultaneous Hypersensitivity to Balsam of Pine and to Balsam of Peru , Acta Dermatovener 42:21-22, 1962. 12. Weber, L.F.: Dermatitis Venenata Due to Native Woods , Arch Derm Syph 67:388-394, 1953.Crossref 13. White, J.C.: Dermatitis Venenata , Boston: Cupples & Hurd, 1887, p 127. 14. Gessner, O.: Die Gift- and Arzneipflantzen von Mitteleuropa , Heidelberg: Carl Winther, Universitätsverlag, 1953, p 272.
Archives of Dermatology – American Medical Association
Published: Apr 1, 1967