CTBID - Specimen: Culture Referred for Identification, Mycobacterium and Nocardia

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Test ID: CTBID    
Culture Referred for Identification, Mycobacterium and Nocardia

Testing Algorithm Delineates situation(s) when tests are added to the initial order. This includes reflex and additional tests.

When this test is ordered, the reflex test may be performed and charged. All mycobacteria and Nocardia (including aerobic actinomycetes) submitted will be identified and billed as appropriate.


See Culture Referred for Identification Mycobacterium Algorithm in Special Instructions.

Specimen Type Describes the specimen type needed for testing


Specimen Required Defines the optimal specimen. This field describes the type of specimen required to perform the test and the preferred volume to complete testing. The volume allows automated processing, fastest throughput and, when indicated, repeat or reflex testing.

Specimen Type: Organism in pure culture

Container/Tube: Middlebrook (7H10 or 7H11) or Lowenstein-Jensen medium slant or in broth (eg, Mycobacteria Growth Indicator Tube [7H9] broth)

Specimen Volume: Isolate

Collection Instructions:

1. Organism must be in pure culture, actively growing. Do not submit mixed cultures.

2. Place specimen in a large infectious container (Supply T146) and label as an etiologic agent/infectious substance.

Additional Information:

1. Specimen source is required.

2. Isolate description is required: Gram stain reaction, morphology, tests performed.

3. See Infectious Specimen Shipping Guidelines in Special Instructions for shipping information.

Forms: If not ordering electronically, complete, print, and send a Microbiology Test Request Form (T244) with the specimen (http://www.mayomedicallaboratories.com/it-mmfiles/microbiology_test_request_form.pdf).

Reject Due To Identifies specimen types and conditions that may cause the specimen to be rejected








Agar plate

Specimen Stability Information Provides a description of the temperatures required to transport a specimen to the laboratory. Alternate acceptable temperature(s) are also included.

Specimen TypeTemperatureTime
VariesAmbient (preferred)