Table 3. Cost-effectiveness of diagnostic strategies for 1.5 million persons with suspected active TB in India.

Diagnostic Test	Cost (US$)	Additional TB Cases Treated	Additional False-Positive Cases Treated	Secondary Cases Averted	DALYs Averted	Incremental DALYs Averted	Incremental Cost per DALY Averted (US$)
Performed alone, relative to no microbiological testing
Sputum smear microscopy	11.9 million	44,000	36,000	443,000	623,000	623,000	19
anda-TB serology	47.5 million	58,000	157,000	411,000	520,000	(Dominated)	(Dominated)
Performed on smear-negative specimens only, relative to sputum smear alone
MGIT culture	27.6 million	26,000	12,000	112,000	130,000	130,000	213
anda-TB serology	39.0 million	24,000	152,000	112,000	110,000	(Dominated)	(Dominated)