Latex hypersensitivity: relationship with positive prick test and patch test responses among hairdressers.

Abstract

Natural rubber latex is a frequent cause of IgE-mediated allergy in hairdressers; but a non-IgE-mediated allergy to latex proteins can also occur. Sixty-one hairdressers, reporting latex glove-related symptoms, were enrolled in the study. They were evaluated for latex allergy by assessment of serum specific IgE and skin prick tests. Patients were patch tested to a rubber additive series and to latex. Proportions were compared by one-tailed Fisher's exact test; mean values of continuous variables were compared by Student's t-test. A diagnosis of IgE-mediated latex allergy was made in 11 (18%) hairdressers; patch tests with rubber-related antigens were positive in 24 (39.3%) subjects. The most positive patch tests were those with para-phenylenediamine (33%). Two hairdressers (3.3%) showed delayed reactions to the latex sample. Hairdressers with IgE-mediated latex allergy were older and presented a personal history of atopy and local hives after exposure to latex; they were more likely to have a positive response to other allergens on prick or patch testing. Our study demonstrates a certain number of false-positive and false-negative results when reported symptoms of possible latex sensitivity were compared to prick and CAP tests to latex, indicating the problems of relying solely on self-report.