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Severe occupational systemic reactions to persulphates have rarely been described and if so mainly after skin contact with bleaching products. We report the first case of a hairdresser with an allergy to persulphates obtained during professional work, who developed anaphylaxis caused by persulphates present in dental cement during dental treatment. This case documents that sensitization to occupational allergens can induce severe systemic reactions outside the workplace. Additionally, it also recommends the need for greater awareness of medical professionals, including dentists, of the possibility of anaphylaxis in patients with occupational allergy., (© The Author 2016. Published by Oxford University Press on behalf of the Society of Occupational Medicine. All rights reserved. For Permissions, please email: journals.permissions@oup.com.)

Background: Hairdressers are occupationally exposed to many allergenic and irritating substances. Additionally, hairdressing apprentices are exposed to the same allergens as professional hairdressers, due to the fact that vocational training starts in the beginning of the education. This study was undertaken to investigate early occurrence of sensitization to occupational allergens in hairdressing apprentices before the onset of the vocational training., Material and Methods: Three hundred and seven hairdressing apprentices were assessed using a questionnaire and skin prick tests (SPTs) to common and occupational allergens. The level of total and serum specific immunoglobulin E (IgE) to occupational allergens was evaluated and spirometry was performed., Results: At least one skin and/or respiratory and/or conjunctival symptom was reported by 29.9% of subjects. Among subjects with at least one symptom, 28.2% of them were atopic whereas among 43.4% of them total IgE level was elevated. Atopy was found in 20% cases. In the case of one apprentice, positive SPT for paraphenylenediamine was found. Nearly 33% of apprentices had elevated total IgE level and 5 of them had specific IgE for occupational allergens., Conclusions: The study revealed that hairdressing apprentices might be sensitized to occupational allergens even before the beginning of vocational training, due to prior non-professional exposure to hairdressing agents. Furthermore, many of them report skin, respiratory and conjunctival symptoms, often connected with chronic disease diagnosis. Thus, candidates for hairdressers should be examined thoroughly before the start of the education and tests for allergy to hairdressing substances are indicated. Med Pr 2016;67(5):567-575., (This work is available in Open Access model and licensed under a CC BY-NC 3.0 PL license.)

Hairdressers are occupationally exposed to many substances both, allergizing and irritating. The continuous development of hairdressing services brings about new risks. The most important allergens are: persulfates (ammonium and potassium), paraphenylenediamine, and latex. A growing number of occupational allergens in the work environment of hairdresses, providing that most of them are low weight allergens, may cause some diagnostic problems. Health risks related with haidressing occupation, have prompted the researchers to pay more attention to risk factors of occupational allergy. Owing to the fact, that first morbid symptoms may occur very early, even during the apprenticeship in a hairdressing school, it is very important to indentify health risks, which can be useful in predicting the onset of occupational allergy and in developing effective prevention methods. The most common allergens at the hairdressers' workplace, risk factors, diagnostics of occupational asthma and rhinitis, as well as the prevention of these diseases are reviewed in this publication.