Airborne contact dermatitis due to propolis

Propolis

“…119,135 Patch tests to colophony, however, are overrepresented; common ingredients may include resin acids such as (dehydro)abietic acid and certain monoterpenes. 99,119,178,179 A high degree of coreactivity to poplar buds and extracts is to be expected, poplar buds being the most important source of propolis. 99,119,178,179 A high degree of coreactivity to poplar buds and extracts is to be expected, poplar buds being the most important source of propolis.…”

“…92 2/3 (67%) 91 8/9 (89%) 38 18/21 (86%) Phenethyl caffeate 20/27 (74%) 22 10/10 (100%) 92 2/3 (67%) 91 32/40 (80%) Benzyl caffeate 18/27 (67%) 22 2/2 (100%) 92 20/29 (69%) 3-Methyl-2-butenyl caffeate † 17/27 (63%) 22 2/3 (67%) 171 7/7 (100%) 92 3/9 (33%) 181 30/47 (64%) 1/1 (100%) 99 Coniferyl benzoate 1/2 (50%) 92 1/2 (50%) Geranyl caffeate 11/27 (41%) 22 11/27 (41%) Ferulic acid dimethylallyl ester 3/9 (33%) 181 3/9 (33%) Eugenol 6/16 (38%) 175 ‡ 0/3 (0%) 171 22 3/19 (16%) 148 6/46 (13%) Tectochrysin 2/27 (7%) 22 1/7 (14%) 182 0/3 (0%) 171 0/6 (0%) 92 6/49 (12%) 0/1 (0%) 91 3/5 (60%) 38 Aesculetin 2/19 (11%) 148 2/19 (11%) Cinnamylideneacetic acid 2/19 (11%) 148 2/19 (11%) Ferulic acid 1/27 (4%) 22 3/19 (16%) 148 4/46 (9%) Benzyl cinnamate 0/27 (0%) 22 1/12 (8%) 175 ‡ 2/9 (22%) 92 0/1 (0%) 91 4/53 (8%) 1/1 (100%) 121 0/3 (0%) 100 Vanillin 0/27 (0%) 22 2/12 (17%) 175 ‡ 0/1 (0%) 121 0/3 (0%) 100 2/46 (4%) 0/3 (0%) 171 Methyl cinnamate 1/27 (4%) 22 1/27 (4%) Benzoic acid 0/27 (0%) 22 1/3 (33%) 92 0/3 (0%) 171 Unfortunately, the most important sensitizers, the esters of caffeic acid (caffeates), are not available for patch testing. The propolis from Chemotechnique comes from China (probably poplar-type propolis) and contains 13% flavonoids.…”

Direct and airborne contact dermatitis from propolis in beekeepers

“…The 3rd patient shows an atypical form of sensitization, airborne. In the literature, only 1 case (5) of airborne contact dermatitis due to propolis has been published, within it quoted another possible similar case.…”

Direct and airborne contact dermatitis in a beekeeper from the Małopolska region

“…In world-wide literature, there have been described only three cases and only two of them were related to beekeepers [6,8,9]. The airborne contact dermatitis seems to be very rare and not many beekeepers or even physicians are conscious of this kind of allergy.…”