If it does , it identifies that allergen as an object to be attacked , thus priming the body for an allergic reaction the next time the allergen in question is encountered 免疫系统致敏之后，就会把过敏原识别为进攻的目标物，再次预见目标过敏原就会动员机体产生超敏反应。
This is contact dermatitis , a form of type iv hypersensitivity 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。
Type i mediated hypersensitiity reactions , or anaphylaxis , occur within minutes after the administration of a certain medication or substance , the antigen , and lead to an immediate response 型介导的超敏反应或过敏发生迅速，常在使用特定药物或物质、抗原后的几分钟内即可发生。
Type i mediated hypersensitivity reactions , or anaphylaxis , occur within minutes after the administration of a certain medication or substance , the antigen , and lead to an immediate response 型介导的超敏反应或过敏发生迅速，常在使用特定药物或物质、抗原后的几分钟内即可发生。
It can induce delayed - type hypersensitivity in guinea pig , both nature and recombinated protein can induce protective t - cell responses , so it can be used both vaccine and diagnosis reagents of tb Mpt64蛋白能诱发mtb感染豚鼠迟发型超敏反应( delayed - typehypersensitivity ， dth ) ，天然和重组的mpt64蛋白均可引起特异的保护性免疫反应。
Methods five tests , including hypoxia tolerance test , serum content determination of sod and mda in mice , carbon clearance and weight determination of immune organ , content determination of serum hemolysin , and delayed - type hypersensitivity test were carried out to evaluate the main pharmacological indexes of lilium brownii polysaccharide 方法通过耐缺氧实验及小鼠血清中sod 、 mda含量测定，网状内皮系统的碳粒廓清速度及免疫器官重量测定，血清溶血素含量测定，迟发型超敏反应等实验对百合多糖的主要药理指标进行考察。
