5- Flucytosine, Antibiotic Assay, Serum
Test Mnemonic
FLCYT
CPT Codes
- 80299 - QTY (1)
Aliases
- 5-Flucytosine
- 5-Fluorocytosine
- Ancobon
- Antimicrobial Assay, 5-Flucytosine
- Fluorocytosine
Includes
- 5-Flucytosine, S
Performing Laboratory
Mayo Clinic Dpt of Lab Med & Pathology
FDA Category
Laboratory Developed Test
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL | Serum | No additive (Red) | Refrigerated | Trough specimen should be collected immediately prior to next dose. Peak level should be collected 1 to 2 hours after oral dose, or 30 minutes after IV infusion. Separate serum from cells ASAP or within 2 hours of collection and transfer to standard aliquot tube. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.3 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 28 days |
| Refrigerated | 28 days |
| Frozen | 28 days |
Days Performed
Tue, Thu
Turnaround Time
4 - 9 days
Methodology
| Name | Description |
|---|---|
| Liquid Chromatography-Tandem Mass Spectrometry (LC-MS/MS) |
Reference Range
| 5-FLUCYTOSINE, SERUM | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Normal | Therapeutic: Peak >25.0 (difficult infections may require higher concentrations) | mcg/mL | Normal | Toxic: Peak >100.0 | mcg/mL |
Special Info
This test is New York state approved.
Clinical Info
This test is useful for monitoring serum concentration during therapy, evaluating potential toxicity, and evaluating patient compliance.