title: Patch testing with colophony.
abstract: Colophony (rosin) has been fractionated into 2 parts, an acidic and a neutral fraction. Routine patch testing with neutral components gives positive reactions at a 40% higher frequency than routine patch testing with colophony (20%) (w/w in pet.). A concentration of 60% colophony is suggested for routine patch testing.
mesh_terms: D003877:Dermatitis, Contact / Q000175:diagnosis* / Q000209:etiology; D006801:Humans; D010328:Patch Tests / Q000379:methods*; D012116:Resins, Plant / Q000009:adverse effects* / Q000276:immunology; D012882:Skin Tests / Q000379:methods*
chemical_list: D012116:Resins, Plant; C013893:rosin