Contact dermatitis, photoallergic
Photoallergic contact dermatitis (PACD) is a type of allergic contact dermatitis. The causative agent becomes biologically active as an allergen only after it absorbs UV light. Patients experience delayed itching and vesiculation, and only sensitized individuals react. The diagnosis of PACD can be confirmed by photo-patch testing. Occupational PACD is most prevalent among pharmacists and pharmaceutical workers who handle sulfanilamide, promethazine, or chlorpromazine. [Marks, p. 201-5]
At least 4 days and may take years to become sensitized; Once sensitized, the worker's dermatitis begins one to several days contact and sufficient UV exposure.
Photo patch testing
|Related Information in Haz-Map|
Symptoms/Findings associated with this disease:
High risk job tasks associated with this disease:
Hazardous agents that cause the occupational disease: