Volume 8 Supplement 1

3rd WAO International Scientific Conference (WISC) 2014

Open Access

Prevalence of late cutaneous reactivity to metabisulfites in patients with and without chronic eczema in Argentina

  • Ledit Ardusso1,
  • Jorge Molinas2,
  • Victor Espirito Santo Cunha3,
  • Tielli Magnus3 and
  • Ruppert Ludwig Hahnstadt3
World Allergy Organization Journal20158(Suppl 1):A71

https://doi.org/10.1186/1939-4551-8-S1-A71

Published: 8 April 2015

Background

Sulfites are used as preservatives and antioxidants in the cosmetic, pharmaceutical and food industry. The prevalence of sensitization caused by sulfites in Argentina is unknown.

Methods

Twenty two participants, 14 males and 8 females (mean age 31 years old), without eczema (Group 1) and 20 patients, 3 males and 17 females (mean age 35 years old), with chronic eczema (Group 2), living in Rosario, Argentina, were patch tested (PT) with sodium metabisulfite (MBS – CAS: 7681-57-4) 1% in petrolatum and with Brazilian Contact Standard Series (FDA Allergenic, Brazil). For the test, Finn Chambers (SmartPractice, USA) with 8mm (standard series) and 12mm (MBS) of diameter were used and the patch testing was performed according to the International Contact Dermatitis Research Group criteria (2 days of occlusion, readings on D2 and D4, using a score from + to +++). Chi-squared test was used to examine whether there was a significantly statistical difference between positive reactions frequencies observed in two groups. The significance level for group differences was set at p< 0.05. The software used for this analysis was the GraphPad Prism version 6.

Results

Three participants (13.6%) of Group 1 and four (20%) of Group 2 presented positive reactions to MBS. There was no statistical difference between groups (p=0.58). All participants of group 2 presented at least one positive reaction to substances of the Brazilian Contact Dermatitis Standard Series (FDA Allergenic) while no participants from Grupo 1 reacted to it. None of the patients with MBS PT (+) and/or (-) had a suspected history of symptoms elicitation after the consumption of food and/or beverages with MBS as additive.

Conclusions

We concluded that MBS 1% in petrolatum is suitable for patch test but the relevance of positive reaction to MBS 1% has to be better explained before its use in standard series.

Authors’ Affiliations

(1)
Medical Sciences University. National University of Rosario
(2)
University of the Center Educational Latino Americano
(3)
FDA Allergenic

Copyright

© Ardusso et al; licensee BioMed Central Ltd. 2015

This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.

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