（一）联合免疫缺陷病（表17-17）表17-3联合免疫缺陷病续表注：↓下降，→正常，↘逐渐下降，XL：X连锁遗传，AR：常染色体隐性遗传，ADA：腺苷脱氨酶，RAG：重组活化基因联合免疫缺陷病（combinedimmunodeficiency）该组疾病中T和B细胞均可能有明显缺陷，临床表现为婴儿期严重致死性感染，细胞免疫和抗体反应均缺陷外周血淋巴细胞减少T淋巴细胞为主。
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