Advanced Diagnostic Laboratories

Collect

Submit a slant or =2.0 mL of a broth culture. Specify the type of media used.

Unacceptable Conditions

Mixed cultures or non-viable organisms.

Organisms submitted on a Petri dish.

Notes

• MTB1 replaces test code 3a, effective February 1, 2013.
• A direct agar proportion test using 10 drugs in Middlebrook 7H11 will be performed on an AFB smear positive, NAAT positive clinical specimen. An indirect test will be performed on a pure culture of MTB complex. Refer to Interpretive Data section for list of drugs and concentrations.
• There is an additional charge for purification/isolation of cultures containing a non-acid-fast contaminant, or more than one mycobacterial species.
  Members of the Mycobacterium tuberculosis (MTB) Complex

  Frequently Isolated	Rarely Isolated
  M. tuberculosis	M. microti
  M. bovis	M. caprae
  M. bovis (BCG)	M. canettii
  M. africanum	M. pinnipedii
  	M. mungi