CTB - Overview: Mycobacteria and Nocardia Culture

Test Catalog

Test Name

Test ID: CTB    
Mycobacteria and Nocardia Culture

Useful For Suggests clinical disorders or settings where the test may be helpful

Detection and identification of Mycobacterium species, Nocardia species, and other aerobic actinomycetes


Identification is performed using the Hologic/GenProbe AccuProbes for selected Mycobacterium species, MALDI-TOF mass spectrometry, or 500-base pair 16S rRNA gene sequencing


M tuberculosis complex species identification can be done upon request using rapid PCR targeting the regions of difference (RD) genomic areas

Reflex Tests Lists tests that may or may not be performed, at an additional charge, depending on the result and interpretation of the initial tests

Test IDReporting NameAvailable SeparatelyAlways Performed
ISMYID by 16S SequencingNo, (Bill Only)No
RMALMId MALDI-TOF Mass Spec AFBNo, (Bill Only)No
RTBSPId, Mtb Speciation, PCRNo, (Bill Only)No
TBMPMycobacteria Probe IdentNo, (Bill Only)No
TBPBMycobacteria Probe Ident BrothNo, (Bill Only)No
TBTMycobacteria Culture, ConcNo, (Bill Only)No
TISSRTissue ProcessingNo, (Bill Only)No

Testing Algorithm Delineates situations when tests are added to the initial order. This includes reflex and additional tests.

When this test is ordered, a reflex test may be performed and charged.


See Mycobacterial Culture Algorithm in Special Instructions.

Special Instructions and Forms Library of PDFs including pertinent information and consent forms, specimen collection and preparation information, test algorithms, and other information pertinent to test

Method Name A short description of the method used to perform the test

Automated Detection of Positive Cultures Followed by Organism Identification with Rapid Methods, which may include Nucleic Acid Probes, DNA Sequencing, and MALDI-TOF Mass Spectrometry

NY State Approved Indicates the status of NY State approval and if the test is orderable for NY State clients.


Reporting Name A shorter or abbreviated version of the Published Name for a test; an abbreviated test name

Mycobacterial Culture

Aliases Lists additional common names for a test, as an aid in searching

Acid Fast Bacilli (AFB) Smear
Acid Fast Smear
Bacillus, acid-fast
Culture for TB (Tuberculosis)
Smear, Acid Fast Bacilli-AFB
TB (Tuberculosis) Culture