变态反应也叫超敏反应。是指免疫系统对一些对机体无危害性的物质如花粉、动物皮毛等过于敏感，发生免疫应答，对机体造成伤害。人们日常遇到的皮肤过敏，皮肤骚痒、红肿，就是一种变态反应。
But the eczema pathogenesis is mainly type Ⅳ allergy.
而湿疹发病机理主要是Ⅳ型变态反应。
参考来源 - 美能注射液治疗泛发性湿疹的疗效评价和作用机制的探讨The experiment shows that QRLSY can remarkably restrain I allergic reaction and activity of 5-LO.
实验显示，清热利湿饮可明显抑制Ⅰ型变态反应、抑制5-脂氧合酶活性。
参考来源 - 清热利湿法治疗荨麻疹的临床与实验研究Results :Qufengzhiyang Granule can inhibit the passive cutaneous anaphylaxis,reduce the contents of IL-4、IgE and increase the IFN-γin cutaneous anaphylaxis reaction rats model.
结果:祛风止痒颗粒可抑制大鼠PCA反应;降低Ⅰ型变态反应模型大鼠血清中IL-4、IgE的含量、增加血清中IFN-γ的含量。
参考来源 - 祛风止痒颗粒抗Ⅰ型变态反应作用及其机制研究TypeⅠallergy, as well as called immediate hypersensitivity, is often encountered in clinic.
Ⅰ型变态反应是临床较为常见的一种变态反应，又称速发型变态反应。
参考来源 - 猪瘟疫苗的豚鼠变态反应试验·2,447,543篇论文数据，部分数据来源于NoteExpress
这一研究通过网络发表于《变态反应与临床免疫学杂志》。
The study is published online in the Journal of Allergy and Clinical Immunology.
儿童期哮喘的治疗着重在变态反应，因为大多数哮喘儿童有变态反应。
Childhood asthma treatments are heavily focused on allergic responses, since most children with asthma also have many allergies.
同样，农作物育种通常会带有风险（例如变态反应），但是，我们仍然接受这些风险。
Similarly, crops bred conventionally may carry risks, such as allergic reactions, but again we accept the risks.
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