Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Scoring of patch test in accordance with ICDRG.
| Score | Reactions |
|---|---|
| − | Negative reaction |
| +? | Doubtful reaction; faint erythema only |
| + | Weak (non-vesicular) positive reaction; erythema, infiltration and possibly papules |
| ++ | Strong (vesicular) positive reaction; erythema, infiltration, papules, vesicles |
| +++ | Extreme positive reaction; bullous reaction |
| IR | Irritant reaction |
