[Phenotypic analysis in peripheral blood lymphocytes of patients with pulmonary tuberculosis]

In order to clarify the immunological aspects of tuberculosis, phenotype of peripheral blood lymphocytes was analyzed in 96 patients with pulmonary tuberculosis and 43 normal controls. In tuberculosis, CD8 positive T cells were significantly decreased in comparison with normal controls and regarding expression of CD3, CD4, CD19, CD16 and gamma delta T cell receptor (TCR), there was no significant difference between tuberculosis and normal controls, though in tuberculosis CD4 positive T cells tended to be high as compared to normal controls. With respect to previous therapeutic condition, the group with previous chemotherapy had significantly high CD4 positive cells, low CD8 positive cells and low gamma delta TCR positive cells as compared to the group without previous chemotherapy. Between groups divided by Type or Expansion of pulmonary tuberculosis without previous chemotherapy, there was no significant difference regarding any surface markers. Regarding pulmonary tuberculosis with previous chemotherapy, the group of Type II had significantly high CD4 positive cells and low CD8 positive cells as compared to Type III, and in the group of Expansion 3, CD19 positive cells were significantly high as compared to Expansion 2. Characteristic of phenotype in peripheral blood lymphocytes of patients with pulmonary tuberculosis is predominant CD4 positive cells in a corresponding decrease in the proportion of CD8 positive cells and is no elevation of gamma delta TCR positive T cells.