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Test Code MMLRG Antimicrobial Susceptibility, Acid-Fast Bacilli, Rapidly Growing, Varies

Biohazard Infectious

Reporting Name

Susceptibility, AFB, Rapid Grower

Useful For

Determination of resistance of rapidly growing mycobacteria to antimicrobial agents

Performing Laboratory

Mayo Clinic Laboratories in Rochester

Specimen Type

Varies


Additional Testing Requirements


CTB / Mycobacteria and Nocardia Culture or CTBID / Culture Referred for Identification, Mycobacterium and Nocardia must also be ordered and will be charged separately unless identification of organism is provided.



Shipping Instructions


1. See Infectious Specimen Shipping Guidelines in Special Instructions.

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



Necessary Information


Specimen source and suspected organism identification are required.



Specimen Required


Specimen Type: Organism

Supplies: Infectious Container, Large (T146)

Container/Tube: Middlebrook 7H10 agar slant or other appropriate media

Specimen Volume: Pure isolate

Collection Instructions: Organism must be in pure culture, actively growing.


Specimen Minimum Volume

NA

Specimen Stability Information

Specimen Type Temperature Time Special Container
Varies Ambient (preferred)
  Refrigerated 

Reference Values

 
Antimicrobial

Susceptible (mcg/mL)

Intermediate (mcg/mL)

Resistant (mcg/mL)

Amikacin

≤16

32

≥64

Cefoxitin

≤16

32-64

≥128

Ciprofloxacin

≤1.0

2.0

≥4.0

Clarithromycin

≤2.0

4.0

≥8.0

Doxycycline

≤1.0

2.0-8.0

≥16

Imipenem

≤4.0

8.0

≥16

Tobramycin

≤2.0

4.0

≥8

Linezolid

≤8.0

16

≥32

Trimethoprim/Sulfamethoxazole

≤2/38

-

≥4/76

Moxifloxacin

≤1.0

2

≥4.0

Tigecycline

No interpretations available

Day(s) and Time(s) Performed

Varies

Test Classification

This test was developed and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the U.S. Food and Drug Administration.

CPT Code Information

87186

LOINC Code Information

Test ID Test Order Name Order LOINC Value
MMLRG Susceptibility, AFB, Rapid Grower 29579-0

 

Result ID Test Result Name Result LOINC Value
MMLRG Susceptibility, AFB, Rapid Grower 29579-0

Additional Tests

Test ID Reporting Name Available Separately Always Performed
SRG Susceptibility Rapid Grower No, (Bill Only) Yes

Testing Algorithm

When this test is ordered, Susceptibility Rapid Grower will be performed and charged.

Reject Due To

Other Agar plate

Method Name

Minimum Inhibitory Concentration (MIC) by Microtiter Broth Dilution Method

Forms

If not ordering electronically, complete, print, and send a Microbiology Test Request (T244) with the specimen.