title: Persistence of contact sensitivity to ethylenediamine.
abstract: 33 patients positive to ethylenediamine in 1974 or 1975 were recalled for re-patch testing in 1984/85. 22 answered the letter and 16 came for retesting, of whom approximately 25% now had a negative patch test.
mesh_terms: D000328:Adult; D000368:Aged; D003877:Dermatitis, Contact / Q000209:etiology*; D005029:Ethylenediamines / Q000009:adverse effects*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D008297:Male; D008875:Middle Aged; D012882:Skin Tests; D013997:Time Factors
chemical_list: D005029:Ethylenediamines; C031234:ethylenediamine