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Delayed patch test reactions at days 7 and 9.
- Source :
-
Contact dermatitis [Contact Dermatitis] 1989 Feb; Vol. 20 (2), pp. 127-32. - Publication Year :
- 1989
-
Abstract
- 403 consecutive patients were examined on days 2, 4, 7, and 9 following application of patch tests. Late positive reactions, i.e., those which manifested after day 4, were seen in 29 patients (7.2%). The allergens which most commonly produced late positive reactions were neomycin (7), potassium dichromate (4), and cobalt (3). Paired patch test readings on days 4 and 7 were more reliable than those on days 2 and 4. If only 1 patch test reading were performed, a single reading on day 4 would have been most useful. The reading on day 9 proved to be of limited value. Of 11 patients who were retested after an interval of more than 6 months, 7 showed earlier eliciting reactions, which may have been due to active sensitization.
- Subjects :
- Humans
Patch Tests
Time Factors
Dermatitis, Contact etiology
Subjects
Details
- Language :
- English
- ISSN :
- 0105-1873
- Volume :
- 20
- Issue :
- 2
- Database :
- MEDLINE
- Journal :
- Contact dermatitis
- Publication Type :
- Academic Journal
- Accession number :
- 2706961
- Full Text :
- https://doi.org/10.1111/j.1600-0536.1989.tb03121.x