II. Definition
- Pustule, Blister or ulceration in response to minor Skin Trauma
III. Technique
- Pustule or ulceration forms within 24-48 hours in response to minor Skin Trauma (e.g. SQ Injection)
- Minor induced Skin Injury
- Subcutaneous saline injection (small volume) or
- Skin prick with small gauge sterile needle
- Observe Skin Trauma site
- Positive if small red Pustule or Skin Ulcer (2 mm) forms within 24-48 hours of minor Skin Trauma