Ducombs G, Lamy M, Bergaud J J, Tamisier J M, Gervais C, Texier L
Ann Dermatol Venereol. 1979 Oct;106(10):769-78.
The combination of a mechanical phenomenon (penetration of the hair) and a chemical phenomenon (discharge of a toxic substance) accounts for the pathological symptomatalogy induced by the processional pine caterpillar. Epidemiological study has pin-pointed the regions infested by the pine caterpillar and has described in detail the dermatitis inflicted by this caterpillar with special emphasis on the frequency of ocular lesions. Also, a close correlation was noted between the geographical density of the populations of Thaumetopoea pityocampa Schiff and the geographical density of the clinical cases recorded. Skin tests have confirmed that the urticant substance is histamino-liberating. A morphological study of the urticant apparatus of this caterpillar ("mirror" and urticant hairs) was undertaken with the scanning electron microscope. The progressive coming into place of the bristles on the cuticular pads of the "mirror" was followed during the last three larval stages (L3, L4 et L5). The urticant hair, hollow on the inside, carries pointed spikes directed towards its distal end. There is no hole or pores on the hair and the necessity to grind the bristles in order to extract the urticant substance leads us to believe that the hair is really a bulb which must be broken, for example in the skin, in order to release its urticant substance (histamino-liberating).
机械现象（毛发刺入）和化学现象（有毒物质释放）的结合导致了松 procession 毛虫引发的病理症状。流行病学研究已明确指出松毛虫的侵染区域，并详细描述了这种毛虫造成的皮炎，特别强调了眼部病变的发生率。此外，还发现了松异舟蛾种群的地理密度与所记录临床病例的地理密度之间存在密切关联。皮肤试验证实，引起荨麻疹的物质具有释放组胺的作用。利用扫描电子显微镜对这种毛虫的致痒器（“镜面”和致痒毛）进行了形态学研究。在最后三个幼虫阶段（L3、L4和L5）观察了“镜面”角质层垫上刚毛的逐渐形成过程。致痒毛内部中空，其远端有尖锐的刺。毛发上没有孔或孔隙，且必须研磨刚毛才能提取致痒物质，这使我们相信毛发实际上是一个球状物，必须将其弄破，例如在皮肤中弄破，才能释放出致痒物质（释放组胺）。
