Antimicrobial Susceptibility - Anaerobe

Casandra

Casandra Test Code AR10242Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0060202CPT Code 87186

Antimicrobial Susceptibility - Anaerobe

Also known as: MA ANA

Clinical Use

Order Test

Use

The Antimicrobial Susceptibility - Anaerobe test is used to determine the in vitro susceptibility of anaerobic bacterial organisms to various antimicrobial agents. This test assists in guiding treatment decisions for serious infections involving anaerobic bacteria, especially in cases that involve critical sites such as blood, bone, joint, tissue, or brain abscesses. It helps clinicians tailor antibiotic therapy based on specific susceptibilities, thereby improving treatment outcomes and minimizing the use of broad-spectrum antibiotics.

Special Instructions

Anaerobic susceptibility testing is recommended for serious infections. Special instructions include ensuring the specimen is an actively growing organism in pure culture. If the species identification is not provided, ARUP will perform it, and additional charges will apply. Selective reporting by organism and source is available. An additional processing fee is billed for organisms not submitted in pure culture.

Limitations

The test employs broth microdilution methodology, which may not have CLSI guidelines for some anaerobes other than the Bacteroides fragilis group. Interpret results with caution as susceptibility is performed by non-standardized methodologies. The provided MIC values are interpretive and should be correlated clinically. The susceptibility determination is only valid for the submitted organism and conditions, and results may not be extrapolated to other organisms or conditions.

Test Details

New York Approved

Methodology

Culture-based

Biomarkers

Cutibacterium acnes

Microorganism

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

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

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

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

LOINC Codes

Result Codes

29576-6

Result Turnaround Time

5-8 days

Specimen

Other

Volume

Not provided

Minimum Volume

Not provided

Collection Instructions

Transport sealed container with pure culture on agar slant in anaerobic transport pouch or on a swab in anaerobic transport media. Place each specimen in an individually sealed bag.