AIDS 病因病毒(HIV)主要感染T 淋巴细胞和巨噬细胞(Mφ),其宿主广泛。HIV 可在体外感染CD4~+细胞并能增殖。细胞因病毒感染而变性死亡。AIDS 最大特点是CD4~+淋巴细胞减少,T4/T8比例降低。因此它是预测AIDS 的唯一方法。在体外可有上述变化,但在体内除非是AIDS 的晚期,淋巴细胞数、分类、比例及功能是较为稳定的。中枢神经系统,淋巴结及肺组织中,感染HIV 的细胞较血液中高1万倍。且这些感染 AIDS virus (HIV) is mainly infected with T lymphocytes and macrophages (Mφ), its host wide. HIV can infect CD4 ~ + cells in vitro and proliferate. Cells degenerate due to viral infection. AIDS is the most prominent feature of CD4 ~ + lymphopenia, T4 / T8 ratio decreased. So it is the only way to predict AIDS. These changes can occur in vitro, but in the body unless the late AIDS, lymphocyte number, classification, proportion and function is more stable. In the central nervous system, lymph nodes and lung tissue, cells infected with HIV are 10,000 times more abundant than blood. And these infections