Figure 2: OD values for rESAT-6-CFP-10 antigen among culture positive and culture negative patients in Ethiopia. A box plot comparing the OD values for rESAT-6-CFP-10 antigen among culture positive pulmonary TB patients and culture negative non-TB patients. There is a clear difference between the two groups, culture confirmed pulmonary TB patients having a higher median OD value. The difference was found to be statistically significant (p<0.001).