Objective:To characterize the CD4+CD45RA+,CD4+CD45RO+,CD8+CD45RA+ and CD8+CD45RO+T lymphocyte subsets in the peripheral blood of the patients with chronic hepatitis B and to explore their relations with the disease state.Methods:The peripheral blood was collected from 104 patients with chronic hepatitis B and 30 healthy individuals,then CD4+CD45RA+,CD4+CD45RO+,CD8+CD45RA+ and CD8+CD45RO+T lymphocyte subsets were detected by flow cytometry with three-color fluorescence technology.Results:To compare with the control,the percent of CD8+CD45RA+T lymphocyte in patients with mild and severe grad CHB decreased markedly,the percent of CD8+CD45RO+T lymphocyte increased markedly,CD4+,CD8+,CD4+CD45RA+ and CD4+CD45RO+T lymphocyte did not change obviously. Compared with the mild grade CHB,the percent of CD8+CD45RA+T lymphocyte in patients with severe grade CHB decreased obviously(P

ed to construct a series of positive control materials that are applicable to many other immunoassays.