TABLE 2.

Discrepant results between culture and LCx M. tuberculosis Assay obtained for nonrespiratory specimens

Type of specimen	No. of specimens	Smear result	Culture resulta	LCx result	Final interpretation of LCx result
Urine	6	Negative	Positive	Negative	False negative
Feces	1	Negative	Positive	Negative	False negative
Lymph node	3	Negative	Positive	Negative	False negative
Lymph node	3b	Positive	Negative	Positive	True positive
Lymph node	1c	Negative	Negative	Positive	True positive
Pleural exudate	4	Negative	Positive	Negative	False negative
Cerebrospinal fluid	3	Negative	Positive	Negative	False negative
Ascitic fluid	3	Negative	Positive	Negative	False negative
Articular fluid	3	Negative	Positive	Negative	False negative
Tissue biopsy	1	Negative	Positive	Negative	False negative
Tissue biopsy	1d	Positive	Negative	Positive	True positive
Bone marrow	2	Negative	Positive	Negative	False negative
Blood	3	Negative	Positive	Negative	False negative

^aCulture result for M. tuberculosis. 

^bFrom three patients with active TB treated with anti-TB drugs for 1 to 7 months. 

^cFrom one patient with active cervical lymphadenitis and good response to TB treatment. 

^dFrom one patient with active TB treated with anti-TB drugs for 4 months.