Table 4. Detection of MTB in 3 sites using Xpert as first test in high risk groups and as add-on test to microscopy for smear negative presumed TB.

Project	MTB Positive n (%)	MTB Negative n (%)	MTB Inconclusive n (%)	Total
Kenya, Homa Bay	82 (14.1)	460 (79.3)	38 (6.6)	580
Malawi, Chiradzulu	40 (12.8)	224 (71.8)	48 (15.4)	312
Malawi, Thyolo	10 (4.1)	216 (88.2)	19 (7.8)	245
TOTAL	132 (11.6)	900 (79.1)	105(9.2)	1,137