The impact of meteorological conditions on patch test results with 12 standard series allergens (fragrances, biocides, topical ingredients).
Br J Dermatol
; 158(4): 734-9, 2008 Apr.
Article
em En
| MEDLINE
| ID: mdl-18284398
ABSTRACT
BACKGROUND:
Fluctuating irritability of the skin induced by low ambient temperature and humidity may compromise the reproducibility of patch testing.OBJECTIVES:
To assess the impact of temperature and absolute humidity at the time of patch testing on the occurrence of irritant or doubtful (IR/?), weak positive (+) and (strong) positive (++/+++) reactions, respectively, among 12 allergens included in the German Standard Series.METHODS:
Analysis of clinical data collected in the surveillance network IVDK (http//www.ivdk.org) between January 1993 and December 2001 (n = 73 691 patients) combined with meteorological data obtained by the national services in Germany and Austria. Multinomial logistic regression analysis was used to estimate the risk associated with temperature, absolute humidity and vapour pressure, respectively, adjusted for sex, age, atopic dermatitis and duration of patch test application.RESULTS:
For low temperature and humidity, a relevant increase of IR/? reaction frequency was observed in the cases of paraben mix and (chloro-) methylisothiazolinone. Both IR/? and + reactions were significantly increased with respect to the allergens fragrance mix, oil of turpentine, methyldibromo glutaronitrile + phenoxyethanol and particularly formaldehyde, while ++/+++ reactions were hardly affected by weather conditions.CONCLUSIONS:
The observed increase of IR/? reactions may be due to epidermal barrier function impairment. The impact of dry/cold weather on + reactions in terms of possibly false-positive reactions is restricted to few allergens. In the case of + reactions of unknown relevance, a re-test under warm conditions or verification tests such as the repeated open application test or the provocative use test may be recommendable.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Perfumes
/
Testes do Emplastro
/
Alérgenos
/
Dermatite Alérgica de Contato
/
Desinfetantes
/
Umidade
Tipo de estudo:
Clinical_trials
Limite:
Adult
/
Female
/
Humans
/
Male
País/Região como assunto:
Europa
Idioma:
En
Revista:
Br J Dermatol
Ano de publicação:
2008
Tipo de documento:
Article
País de afiliação:
Alemanha