Table 1 |
|
|
Patch testing interpretation key |
|
|
+/- |
Uncertain reaction: faint macular erythema only |
|
+ |
Weak (nonvesicular) positive reaction; erythema, infiltration, possibly papules |
|
++ |
Strong (vesicular) positive reaction; erythema, infiltration, papules, vesicles |
|
+++ |
Extreme positive reaction; bullous reaction |
|
- |
Negative reaction |
|
IR |
Irritant reaction of different types |
|
|
|
|
Adapted from Rietschel & Fowler [16 (p. 24)] (interpretation key of the International Contact Dermatitis Research Group). |
|
|
Stewart et al. BMC Dermatology 2006 6:6 doi:10.1186/1471-5945-6-6 |
|
