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Frequency of allergic contact dermatitis to isoeugenol is increasing: a review of 3636 patients tested from 2001 to 2005.

AbstractBACKGROUND:
Isoeugenol is an important fragrance allergen. The cosmetic industry was recommended voluntarily to reduce concentrations of isoeugenol in finished cosmetic products from 0.2% to 0.02% in 1998. It was suspected that this would reduce the incidence of patch test positivity in individuals undergoing routine patch testing after approximately 2-3 years (the Dillarstone effect).
OBJECTIVES:
To review our patch test data since the change in practice by industry, to see if there has been an observable decrease in isoeugenol contact sensitivity.
METHODS:
We retrospectively analysed all subjects patch tested to isoeugenol 1% pet. in the St John's Department of Cutaneous Allergy over a period of 5 years, commencing 3 years after the changes.
RESULTS:
We identified 3636 subjects, 97 of whom were positive for isoeugenol. Year-on-year incidence shows an increasing trend, with an overall incidence of 2.67%. Using the exact Cochran-Armitage test, this ascending trend is statistically significant (P = 0.0182). Seventy-two of 97 isoeugenol-positive subjects were also positive to fragrance mix I. Other fragrances positive in these 97 patients included Myroxylon pereirae (30%), Evernia prunastri (22%) and eugenol (15%).
CONCLUSIONS:
We suspect that the increasing trend may be due to allergen substitution with compounds chemically related to isoeugenol, or which hydrolyse to isoeugenol itself.
AuthorsJ M L White, I R White, A Glendinning, J Fleming, D Jefferies, D A Basketter, J P McFadden, D A Buckley
JournalThe British journal of dermatology (Br J Dermatol) Vol. 157 Issue 3 Pg. 580-2 (Sep 2007) ISSN: 0007-0963 [Print] England
PMID17573874 (Publication Type: Journal Article)
Chemical References
  • Allergens
  • Perfume
  • Solvents
  • Eugenol
Topics
  • Adult
  • Allergens (adverse effects)
  • Dermatitis, Allergic Contact (etiology)
  • Eugenol (adverse effects)
  • Female
  • Humans
  • Male
  • Middle Aged
  • Patch Tests
  • Perfume (adverse effects, chemistry)
  • Solvents (adverse effects)

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