褐边绿刺蛾幼虫刺毛结构及蛰伤机制初探

刺蛾科幼虫是我国常见的农林业害虫之一,其体表长有防御性的有毒刺毛,会伤害接触者,使其产生瘙痒、刺痛、丘疹、红肿、皮炎等症状.本研究利用体视显微镜、扫描电镜对褐边绿刺蛾Parasa consocia末龄幼虫的刺毛形态结构进行了观察,将不同刺毛提取物进行小鼠足底皮下注射,测试刺激活性,并使用SDS-PAGE电泳对提取物成分...

Preliminary study on the hair structure and sting mechanism of the larva of Parasa consocia

The larvae of Limacodidae are one of the common agriculture and forestry pests in China. They have evolved urticating hairs on their back to resist predator attacks. Contacting with them can cause symptoms such as itching, pain, pimples, redness, swelling and dermatitis. In this work, the structure of urticating hairs of mature larvae of Parasa consocia was observed using a stereo microscope and scanning electron microscope. Extracts of different hairs were injected subcutaneously into the hind paw of mice to test the irritative activity, and preliminary analysis of the extract components was carried out using SDS-PAGE electrophoresis. The results showed that the mature larvae grow four types of urticating hairs: Spines, rod-like spines, modified setae and microspheric setae; the extracts of both spines and modified setae caused redness and pain in mice, furthermore the extracts of modified setae also caused allergic symptoms such as runny nose and secretion of eye gunk. It was found that in addition to mechanical injury, there was a synergistic mode of chemical poisoning by the larvae in three ways: Contamination, injection and sting-carrying toxin, which provided a reference for the treatment of injury.