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Patch testing with a textile dye mix in a baseline series in two countries.

Kristina Ryberg1, An Goossens, Marléne Isaksson

  • 1Department of Occupational and Environmental Dermatology, Skåne University Hospital, Lund University, Malmö, Sweden. Kristina.Morgardt-Ryberg@med.lu.se

Acta Dermato-Venereologica
|May 7, 2011
PubMed
Summary

Patch testing with a 6.6% textile dye mix identified contact allergies in 2.6% of patients. This mix proved more effective than previous versions, with higher allergy rates observed in Belgian patients compared to Swedish patients.

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Area of Science:

  • Dermatology
  • Toxicology
  • Allergy Research

Background:

  • Disperse dyes are frequently implicated as contact sensitizers in textile dye allergies.
  • Previous patch testing methods using lower concentrations of dye mixes have shown varying efficacy.
  • Understanding the prevalence and patterns of textile dye allergy is crucial for public health and occupational safety.

Purpose of the Study:

  • To evaluate the diagnostic yield of a 6.6% textile dye mix in patch testing for contact allergy.
  • To compare the efficacy of the 6.6% dye mix against a previously used 3.2% mix.
  • To investigate geographical variations in contact allergy prevalence to textile dyes between Sweden and Belgium.

Main Methods:

  • A multicenter patch testing study involving 2,049 Swedish and 497 Belgian patients.
  • Patients were tested with a standardized 6.6% textile dye mix containing specific Disperse Blue, Yellow, Orange, and Red dyes.
  • Results were analyzed to determine the overall positive reaction rate and compare it with historical data and between the two countries.

Main Results:

  • A total of 65 patients (2.6%) tested positive for contact allergy to the 6.6% dye mix.
  • The positive reaction rate was significantly higher (p < 0.01) compared to testing with a previous 3.2% mix.
  • Contact allergy prevalence was notably higher in Belgian patients (4.2%) than in Swedish patients (2.1%).

Conclusions:

  • The 6.6% textile dye mix is a more effective diagnostic tool for identifying disperse dye contact allergy than lower concentration mixes.
  • Geographical differences in contact allergy prevalence exist, with Belgian patients showing a higher susceptibility.
  • These findings underscore the importance of standardized patch testing protocols for textile dye allergy diagnosis and management.