Mycobacterium tuberculosis and Rifampin Resistance (MTB-RIF) NAA with AFB Culture

Test ID: 


CPT code:

87556; 87149

Clinical Use:

Detect and identify Mycobacterium tuberculosis complex and an rpoB mutation that is associated with rifampin resistance. Per the College of American Pathologists (CAP) guidelines (MIC.64820), a culture should be performed on all samples regardless of the molecular test result.

Specimen Type:

Bronchial washings or bronchoalveolar lavage (BAL) specimens, pleural fluid or cerebrospinal fluid (CSF

Requested Volume: 


Container Type: 

Sterile cup; CSF (cerebrospinal fluid); sterile screw-capped vial

Storage Instructions:

Refrigerate. Store at a maximum of 35°C for up to three days and then at 2°C to 8°C for up to seven days. Specimen may be stored frozen (below -70°C).

Rejection Criteria

Quantity not sufficient; inappropriate specimen source; specimen from a pediatric patient; specimen received after leaking out of transport container into the specimen bag; inappropriate specimen transport device; unlabeled specimen container or container with a single patient identifier; name discrepancy between the specimen container label and the computer or the requisition; specimen received after prolonged delay (more than seven days unless frozen); specimen in a paraffin block; specimen in a fixative.

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MCI Diagnostic

Providing top patient care with fast results. 

7018 South Utica Avenue

Tulsa, Oklahoma 74136

Hours of Operation

Mon – Sat: 7AM-11PM

Sun: 7AM-3PM

Government Contract

Mon – Sat: 7AM-11PM

Sun: 7AM-3PM


Mon – Sat: 7AM-11PM

Sun: 7AM-3PM

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