Clinical Study

An Early Morning Sputum Sample Is Necessary for the Diagnosis of Pulmonary Tuberculosis, Even with More Sensitive Techniques: A Prospective Cohort Study among Adolescent TB-Suspects in Uganda

Table 3

Diagnostic yield of TB for the spot and incremental diagnostic yield (not total) of EM sputum sample cultures ( ).

Culture methodYield of spot
n (%)
Incremental diagnostic yield for EM (observed)
n (%)
Total number of TB cases detected
n (%)

LJ4 (19.0)2 (9.5)6 (28.6)
MGIT12 (57.1)9 (42.9)21 (100)

n: number, IY: incremental yield, LJ: Lowenstein Jensen, MGIT: mycobacterium growth indicator tube, EM: early morning.