Positive patch test reactions to lanolin: cross-sectional data from the north american contact dermatitis group, 1994 to 2006

Dermatitis. 2009 Mar-Apr;20(2):79-88.

Abstract

Background: The prevalence of lanolin sensitivity in referred patients is less than 4%.

Objectives: To (1) describe patients with positive patch-test reactions to lanolin, (2) determine clinical and occupational relevance associated with reactions to lanolin and common sources, and (3) examine the frequency of co-reacting allergens.

Methods: A retrospective analysis of 26,479 patients patch-tested by the North American Contact Dermatitis Group (NACDG), 1994 to 2006.

Results: Overall, 2.5% of patients (643 of 25,811) tested to lanolin alcohol 30% in petrolatum had positive reactions. Prevalence decreased from 3.7% in 1996 to 1998 to 1.8% in 2005 to 2006 (p <.0001); 83.4% of all positive reactions were currently relevant, but only 2.5% were occupationally relevant. Lanolin-positive patients were 1.2 times more likely to be male and 1.4 times more likely to have a history of atopic dermatitis when compared to allergic, but lanolin-negative, patients (p < .0002 and p < .0001, respectively). Cosmetics were the most common source. Lanolin-positive patients were significantly more likely to be co-sensitized to another NACDG standard screening allergen (p <.0001).

Conclusions: The prevalence of allergic patch-test reactions to lanolin in North America patch-test populations is decreasing. Current relevance of reactions was high, but occupational relevance was low. Concomitant reactions were more common in lanolin-positive patients.

Publication types

  • Comparative Study

MeSH terms

  • Adolescent
  • Adult
  • Age Distribution
  • Aged
  • Allergens
  • Chi-Square Distribution
  • Cross-Sectional Studies
  • Dermatitis, Allergic Contact / diagnosis*
  • Dermatitis, Allergic Contact / epidemiology
  • Dermatitis, Occupational / epidemiology
  • Dermatitis, Occupational / etiology*
  • Dermatology
  • Female
  • Hand Dermatoses / diagnosis
  • Hand Dermatoses / epidemiology
  • Hand Dermatoses / etiology
  • Humans
  • Lanolin / adverse effects*
  • Leg Dermatoses / diagnosis
  • Leg Dermatoses / epidemiology
  • Leg Dermatoses / etiology
  • Male
  • Middle Aged
  • North America / epidemiology
  • Patch Tests / methods*
  • Prevalence
  • Probability
  • Retrospective Studies
  • Risk Factors
  • Sex Distribution
  • Societies, Medical

Substances

  • Allergens
  • Lanolin