Patch testing with the <scp>J</scp>apanese baseline series 2015: A 4‐year experience
Akiko Ito, Kayoko Suzuki, Kayoko Matsunaga, Akiko Yagami, Takashi Ito, Risa Tamagawa‐Mineoka, Atsuko Adachi, Mariko Sugiura, Hitoshi Miyazawa, Atsuko Kato, Tokio Nakada, Kazue Nishioka, Yumiko Kubota, Setsuko Matsukura, Yuko Watanabe, Hideo Asada, Hiromi Kanto
Abstract
BACKGROUND: The Japanese baseline series (JBS), established in 1994, was updated in 2008 and 2015. The JBS 2015 is a modification of the thin-layer rapid-use epicutaneous (TRUE) test (SmartPractice Denmark, Hillerød, Denmark). No nationwide studies concerning the TRUE test have previously been reported. OBJECTIVES: To determine the prevalence of sensitizations to JBS 2015 allergens from 2015 to 2018. METHODS: We investigated JBS 2015 patch test results using the web-registered Skin Safety Care Information Network (SSCI-Net) from April 2015 to March 2019. RESULTS: Patch test results of 5865 patients were registered from 63 facilities. The five allergens with the highest positivity rates were gold sodium thiosulfate (GST; 25.7%), nickel sulfate (24.5%), urushiol (9.1%), p-phenylenediamine (PPD; 8.9%), and cobalt chloride (8.4%). The five allergens with the lowest positivity rates were mercaptobenzothiazole (0.8%), formaldehyde (0.9%), paraben mix (1.1%), mercapto mix (1.1%), and PPD black rubber mix (1.4%). CONCLUSIONS: Nickel sulfate and GST had the highest positivity rates. The JBS 2015, including a modified TRUE test, is suitable for baseline series patch testing.