Relative frequency of each TCRBV family in active TB or LTBI subjects. TCRBV family in PBMCs derived from active TB patients or LTBI individuals were shown as open bars or filled bars respectively. Data are presented as % expression of each TCRBV family relative to the total expression of all 24 TCRBV genes (1 ~ 24). The data represent the means and standard deviation. **P <0.01.