Table 1.

Comparison of sputum, string test, and stool by smear, culture, and MTB/RIF

Sputum smear status	Sputum culture	Sputum Xpert	String Xpert	String culture	MicroSense Bead Xpert	Sugar Xpert	Stool culture	Wong–Baker Faces
Mycobacterium tuberculosis culture-positive, smear-positive
2–4+	M. tuberculosis	Positive	Positive	Positive	Positive	Positive	Negative	1
4+	M. tuberculosis	Positive	Positive	Positive	Positive	Invalid	Positive	6
1+	M. tuberculosis	Positive	Positive	Negative	Negative	Positive	Negative	2
3+	M. tuberculosis	Positive	Positive	Positive	Positive	Invalid	Positive	2
3+	M. tuberculosis	Positive	Positive	Positive	Positive	Positive	Positive	2
1+	M. tuberculosis	Positive	Positive	Positive	Positive	Positive	Positive	2
Mycobacterium tuberculosis culture-positive, smear-negative
Negative	M. tuberculosis	Positive	Positive	Positive	UTP			4
Negative	M. tuberculosis a	Positive	Positive	Positive	Positive	Invalid	Negative	0
Mycobacterium tuberculosis culture-negative
1+	M. avium	Negative	Negative	Negative	Negative	Invalid	Positive	1
3+	M. kansasii	Negative	Negative	Positive	Negative	Negative	Positive	2
Negative	Negativeb	UTP	Negative	Negative	UTP			2
Negative	Negativec	Negative	Negative	Negative	UTP			0
Negative	Negatived	Negative	Negative	Negative	Invalid	Invalid	Negative	2

UTP, unable to produce.

^aSmear and culture were negative from induced sputum. Bronchoscopic lavage fluid was smear-negative, but culture-positive.

^bFinal diagnosis of Streptococcus milleri aspiration related to alcohol intoxication.

^cFinal diagnosis unknown/undetermined and symptoms resolved.

^dFinal diagnosis of interstitial lung disease related to dermatomyositis.