Acid-Fast Bacilli (AFB)
AFB (Acid-Fast Bacilli)
Culture, TB (Tuberculosis)
MTB (Mycobacterium tuberculosis)
Mycobacterium tuberculosis (MTB)
TB (Tuberculosis) Culture
Tubercle Bacilli: Mycobacterium tuberculosis
**All requests must be reviewed before further processing the request.**
Specimen must be processed within 72 hours of collection.
Specimen source is required.
1. Send specimen in original tube.
2. Isolator System/SPS tubes are acceptable, but not preferred.
3. Draw blood in an Isolator/SPS tube and send 8 mL of whole blood in the original Isolator tube.
4. Note: when sending SPS tube, it must be clearly labeled SPS. If label is obscured, sample may be cancelled, as ACD (yellow top) is not an acceptable tube type.
Results must be interpreted in conjunction with the patient's history and clinical picture.
A negative result does not rule out mycobacteremia. The organism may be present at quantities below the limit of detection or may be transiently present.
If Mycobacterium genavense is suspected, indicate on request form or contact laboratory. Mycobactin J (an iron supplement) will then be added to the culture to support growth.
If positive, mycobacteria is identified.
A final negative report will be issued after 42 days of incubation.
A positive result may support the diagnosis of mycobacteremia.