Objective   To study the pathogenicity of lepidoptera eucleidae caterpillar and the clinic symptom of the dermatitis.To provide science thereunder for make control measure early.

  Methods   The guineapigs abdomen and the skin of volunteer was touched directly by mature tea euproctis pseudoconspersa strand; mulberry tussock moth on their upper limb or nature catch poison.The pathogenic cource was observed continuouesly on human dermatitis caused by tea euproctis pseudoconspersa strand, mulberry tussock moth.Pathological local lesion of guineapigs was cut off on time, and was observed with routine histology.The white blood cell WBC and addicted acid granule cell changes were compared before and after poison.

  Results   There were red, turgescence, pain, heat, burning pain, tickle, numbness and papule, macule, maculepapule, urtica, plaque on the local symptom.There was the whole reaction in some cases 76.64%, fantod 32.71%, oxter lymph knot turgescence 16.82%.There were epidermis bulla, vesicle and pustule on routine cut section of lesion of guineapigs.WBC and eosinophil(EOS)were higher after poison than before.

  Conclusion   The eucleidae caterpillar have pathogenicity.Pathogenic mechanism in human dermatitis is machinal damage, poisonous reaction and allergy.