Patch Test Practice Patterns of Members of the American Contact Dermatitis Society

Background. Xiaotong Tiegao (XTT) is an ancient topical Tibetan medicine plaster which is widely used in China. Irritant contact dermatitis (ICD) caused by XTT is very common. It is still unclear why some people are more prone to develop ICD. The aim of this study is to study the baseline skin biophysical parameters and patch test results in individuals predisposing to XTT induced ICD. Methods. During a four-month period, 149 healthy volunteers with ICD and 50 volunteers without ICD after applying XTT were recruited. The skin biophysical parameters were measured, and contact allergy to 20 common allergens was patch tested, at two weeks after the ICD was recovered. Results. There were no significant differences in age and sex between ICD and control groups. It was found that skin median melanin value (176.50 vs 189.50, P < 0.05, Mann-Whitney U-test) and erythema value (319.90 ± 70.49 vs 347.93 ± 84.55, P < 0.05, Independent-Samples T test) were much lower in ICD than control group. Overall patch test results were not different, but the positivity rate of nickel sulfate (15.44% vs 4.00%, P < 0.05, Fisher’s exact test) was significantly higher in ICD group. Conclusions. In conclusion, people with nickel allergy, lower values of skin melanin, and erythema are predisposing to develop ICD.

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Setting up a Patch Test Practice

Common Contact Allergens ◽

10.1002/9781119405702.ch6 ◽

2019 ◽

pp. 89-92

Author(s):

Elin Dafydd Owen ◽

Mahbub M.U. Chowdhury

Keyword(s):

Patch Test ◽

Test Practice

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The Utility of an Occupational Contact Dermatitis Patch Test Database in the Analysis of Workplace Prevention Activities in Toronto, Canada

Annals of Work Exposures and Health ◽

10.1093/annweh/wxaa077 ◽

2020 ◽

Author(s):

D Linn Holness ◽

Irena Kudla ◽

Joel G DeKoven ◽

Sandra Skotnicki

Keyword(s):

Contact Dermatitis ◽

Patch Test ◽

Skin Diseases ◽

Health And Safety ◽

Clinical Information ◽

Clinical History ◽

Surveillance Systems ◽

Test Results ◽

Occupational Contact Dermatitis ◽

Occupational Contact

Abstract Background Occupational skin diseases are common suggesting that there are still gaps in workplace prevention. Patch test surveillance systems provide an opportunity to collect work related information in addition to clinical information and patch test results. Objectives To examine 5 years of data related to workplace prevention by industry sector in a patch test surveillance database for workers with a diagnosis of occupational contact dermatitis. Methods The study was approved by the Research Ethics Board of St Michael’s Hospital. Information including demographics, clinical history, healthcare utilization, and workplace characteristics and prevention practices in addition to patch test results was collected from consenting patients. Results Workers in the healthcare and manufacturing sectors were more likely to report workplace training including skin protection training, whereas those in services and construction were less likely to report training. Conclusions Collecting basic workplace information with patch test surveillance databases can inform the occupational health and safety system about prevention practices in the workplace and identify areas for focussed intervention.

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