TABLE 3.

Results for 205 respiratory specimens from 108 patients: comparison of PCR amplification assays with culture results

Patient statusa	No. of samples	No. of isolates with indicated result by:
		rpoB PCR			katG PCR			inhA PCR
		Positive		Negative	Positive		Negative	Positive		Negative
		Resistant	Susceptible		Resistant	Susceptible		Resistant	Susceptible
Smear positive, culture positive	159	8	146	5	13	141	5	0	154	5
Smear positive, culture negative (final diagnosis: TB)	31	0	31	0	0	29	2	0	31	0
Smear positive, contaminated culture (final diagnosis: TB)	15	0	15	0	0	15	0	0	15	0
Total	205	8	192	5	13	185	7	0	200	0

^aTB, tuberculosis.