IGA

例句：

1. 1. The IGA test is used to detect the presence of antibodies in the blood.
   免疫球蛋白检测用于检测血液中的抗体存在。
2. 2. The IGA levels in the patient's serum were elevated, indicating an active infection.
   患者血清中的免疫球蛋白水平升高，表明有活跃的感染。
3. 3. IGA testing is often used in autoimmune diseases to monitor the body's response to foreign proteins.
   在自身免疫性疾病中，免疫球蛋白测试常用于监测身体对外来蛋白质的反应。