Antimicrobial Susceptibility, Acid-Fast Bacilli, Rapidly Growing, Varies

Casandra

Casandra Test Code MC35043Version 1 (DRAFT)

Performing Lab

Lab Mayo Clinic LabLab Test ID MMLRGCPT Code 87186

Antimicrobial Susceptibility, Acid-Fast Bacilli, Rapidly Growing, Varies

Clinical Use

Use

This test is crucial for determining the susceptibility of rapidly growing mycobacteria to various antimicrobial agents included in the test panel. Rapidly growing mycobacteria are significant pathogens and can cause infections ranging from pulmonary diseases to skin and soft tissue infections. Understanding the susceptibility aids in guiding patient treatment and care.

Special Instructions

For accurate results, the organism must be in pure culture and actively growing. In cases where organism identification is not provided, additional tests such as Mycobacteria and Nocardia Culture may be necessary and will incur separate charges.

Limitations

The test is designed to evaluate the susceptibility of identified rapidly growing mycobacteria. Incorrect or incomplete organism identification can lead to inaccurate susceptibility test results, as the drug panel selection is dependent on the specific Mycobacterium species. The test is not FDA cleared or approved, though it complies with CLIA requirements.

Test Details

New York Approved

Methodology

Culture-based

Biomarkers

Unknown analyte

Analyte

Amikacin • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Cefoxitin • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Ciprofloxacin • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Clarithromycin • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Clofazimine • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Doxycycline • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Imipenem • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Linezolid • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Moxifloxacin • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Tigecycline • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Tobramycin • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

Trimethoprim/sulfamethoxazole • Concentration / Level • Quantitative (Continuous) (e.g., copies/mL, % expression)

LOINC Codes

Order Codes

29579-0

Result Codes

29579-0

Result Turnaround Time

12-28 days

Specimen

Cultured Cells

Volume

Pure isolate

Minimum Volume

Not provided

Container

Middlebrook 7H10 agar slant or other appropriate media

Collection Instructions

Organism must be in pure culture, actively growing.

Causes for Rejection

Agar plate

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