Results of Concurrent Patch Testing of Brazilian and Chinese Propolis
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2024
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| author | Emma M. van Oers Norbertus A. Ipenburg Anton de Groot Evelyn Calta Thomas Rustemeyer |
| author_facet | Emma M. van Oers Norbertus A. Ipenburg Anton de Groot Evelyn Calta Thomas Rustemeyer Emma M. van Oers Norbertus A. Ipenburg Anton de Groot Evelyn Calta Thomas Rustemeyer |
| collection | Wiley Open Access |
| contents | Results of Concurrent Patch Testing of Brazilian and Chinese Propolis Emma M. van Oers Norbertus A. Ipenburg Anton de Groot Evelyn Calta Thomas Rustemeyer Contact Dermatitis ABSTRACT Background In Amsterdam, a steep increase in positive reactions to propolis in the European baseline series was observed from 2.8% in 2020 to 16.4% in 2023. We hypothesised that this was caused by the replacement of Chinese propolis by Brazilian propolis. Objectives To test this hypothesis and to compare rates of positive patch tests to Brazilian propolis with those to Chinese popolis. Patients and Methods In a prospective study, 2 commercial Chinese propolis patch test samples were tested in consecutive patients in addition to Brazilian propolis. Results Of 239 patients patch tested, 57 (23.8%) had a positive reaction to Brazilian propolis, and 9 (3.8%) to Chinese propolis. Of the 57 reactions to Brazilian propolis, only 2 (3.5%) were found to be clinically relevant, versus 3/9 (33.3%) for Chinese propolis. Patients reacting to Brazilian propolis had significantly more co‐reactivities to fragrance mixes 1 and 2 and to limonene hydroperoxides than propolis B‐negative individuals. Conclusions The results confirm our hypothesis that the observed increase in positive patch tests to propolis between 2020 and 2023 was the result of the switch from Chinese to Brazilian propolis. The rates of reactions to both propolis samples from China were significantly lower than to Brazilian propolis. 10.1111/cod.14748 http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| doi_str_mv | 10.1111/cod.14748 |
| format | Artículo Open Access |
| id | wiley_oa_10_1111_cod_14748 |
| institution | Wiley Open Access |
| license_str_mv | http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| publishDate | 2024 |
| publisher | Wiley |
| record_format | wiley_oa |
| spellingShingle | Results of Concurrent Patch Testing of Brazilian and Chinese Propolis Emma M. van Oers Norbertus A. Ipenburg Anton de Groot Evelyn Calta Thomas Rustemeyer Contact Dermatitis Results of Concurrent Patch Testing of Brazilian and Chinese Propolis Emma M. van Oers Norbertus A. Ipenburg Anton de Groot Evelyn Calta Thomas Rustemeyer Contact Dermatitis ABSTRACT Background In Amsterdam, a steep increase in positive reactions to propolis in the European baseline series was observed from 2.8% in 2020 to 16.4% in 2023. We hypothesised that this was caused by the replacement of Chinese propolis by Brazilian propolis. Objectives To test this hypothesis and to compare rates of positive patch tests to Brazilian propolis with those to Chinese popolis. Patients and Methods In a prospective study, 2 commercial Chinese propolis patch test samples were tested in consecutive patients in addition to Brazilian propolis. Results Of 239 patients patch tested, 57 (23.8%) had a positive reaction to Brazilian propolis, and 9 (3.8%) to Chinese propolis. Of the 57 reactions to Brazilian propolis, only 2 (3.5%) were found to be clinically relevant, versus 3/9 (33.3%) for Chinese propolis. Patients reacting to Brazilian propolis had significantly more co‐reactivities to fragrance mixes 1 and 2 and to limonene hydroperoxides than propolis B‐negative individuals. Conclusions The results confirm our hypothesis that the observed increase in positive patch tests to propolis between 2020 and 2023 was the result of the switch from Chinese to Brazilian propolis. The rates of reactions to both propolis samples from China were significantly lower than to Brazilian propolis. 10.1111/cod.14748 http://creativecommons.org/licenses/by-nc-nd/4.0/ |
| title | Results of Concurrent Patch Testing of Brazilian and Chinese Propolis |
| topic | Contact Dermatitis |
| url | https://onlinelibrary.wiley.com/doi/10.1111/cod.14748 |