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Table 1 Reading of patch test reactions according to International Contact Dermatitis Research Group guidelines

From: Two cases of occupational allergic contact dermatitis from a cycloaliphatic epoxy resin in a neat oil: Case Report

Score Patch test reaction Criteria
- Negative No reaction
+? Doubtful Faint erythema only
+ Weak Erythema, infiltration, possibly papules
++ Strong positive Erythema, infiltration, papules, vesicles
+++ Extreme positive Intense erythema and infiltration and coalescing vesicles