Fig. 2

Positivity rates of Xpert pooling assays for the diagnosis of tuberculosis. (a) All patients. (b) Patients with (n = 18) or without cavitation (n = 65 ). (c) Patients with (n = 70) or without cough (n = 16). (d) Patients with very low (n = 17), low (n = 26), medium (n = 17), and high (27) Mtb load defined by the CT values from Xpert. (e) Patients with negative (n = 26), 1⁺ (n = 10), 2⁺ (n = 10), 3⁺ (n = 9), and 4⁺ (n = 26) grade of smear. (f) Patients with < 5 (n = 8), 5–10 (n = 24), 10–20 (n = 27), 20–42 (n = 15), > 42 (n = 7) time-to-positive culture (TTP).