MYCOBACTERIUM TUBERCULOSIS, NAAT
Test Code: LAB1357
Alert
For BAL, Bronch wash and sputum ONLY. See Additional Information.
Synonyms
Mycobacterium tuberculosis Complex PCR; AFB
Alternate Test ID
183456
Specimen Type
BAL, Bronchial wash, Sputum
Specimen Container
Sterile screw-capped vial or sterile cup; seal securely.
Volume
2 mL of raw or expectorated sputum
Minimum Volume
2 mL
Temperature
Refrigerated
Methodology
Nucleic acid amplification (NAA) technology; nested real-time polymerase chain reaction (PCR)
Stability
Refrigerated: 7 days
Turn Around Time
4 - 8 days
Place of Service
LabCorp Halsey Microbiology
Additional Information
For CSF, Miscellaneous body fluids, Pleural fluid, Stool, Tissue,
Urine, order: AFB MTB COMPLEX, NAAT [LAB16091].
Detect and Identify Mycobacteriium tuberculosis complex and an rpoB mutation that is associated with rifampin resistance. Per the College of American Pathologists (CAP) guidelines (MIC 64820), a culture must be performed on all samples regardless of the molecular test result. By ordering this test, the client has assumed responsibility for performance of the AFB culture.
Sendout to LabCorp Halsey Microbiology. Pack out to REFERENCE LAB LABCORP HALSEY MICROBIOLOGY. Note: This is an unpublished test code. For current test information, please consult the Test Menu within LabCorp LINK. Otherwise, please call LabCorp Client Services referencing the test code in Alternate ID for current testing information.
Urine, order: AFB MTB COMPLEX, NAAT [LAB16091].
Detect and Identify Mycobacteriium tuberculosis complex and an rpoB mutation that is associated with rifampin resistance. Per the College of American Pathologists (CAP) guidelines (MIC 64820), a culture must be performed on all samples regardless of the molecular test result. By ordering this test, the client has assumed responsibility for performance of the AFB culture.
Sendout to LabCorp Halsey Microbiology. Pack out to REFERENCE LAB LABCORP HALSEY MICROBIOLOGY. Note: This is an unpublished test code. For current test information, please consult the Test Menu within LabCorp LINK. Otherwise, please call LabCorp Client Services referencing the test code in Alternate ID for current testing information.
Interpretive Data
The assay should NOT be used to test specimens from patients that have been treated with antituberculous drugs for more than three days. The assay should NOT be used to monitor therapy or as a test of cure. A negative test does not exclude the possibility of isolating M tuberculosis complex isolates from culture. Assay interference may occur in the presence of lidocaine, mucin, ethambutol, guaifenesin, phenylephrine, and tea tree oil. Lower sensitivity may be observed in pediatric patients due to the diffuse nature of Mtb infection in the lungs of this patient group and difficulties encountered in obtaining adequate specimens.
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