This is contact dermatitis, a form of typeivhypersensitivity in which pre-sensitized lymphocytes led to this inflammatory reaction a couple of days after contact with the offending plant material.
图示接触性皮炎，由致敏淋巴细胞引起的IV型超敏反应，在接触致敏性物质几天后出现。
2
Both type II and typeiv immune hypersensitivity reactions contribute to this rejection reaction.