Histoplasma Antigen, Urine (Sendout)
General Information
- Lab Name
- Histoplasma Antigen, URN
- Lab Code
- RHSTOU
- Epic Ordering
- Histoplasma antigen, Urine (Sendout)
- External Test Id
- HSTQU
- Description
Useful For:
- Aiding in the diagnosis of Histoplasma capsulatum infection
- Monitoring Histoplasma antigen levels in urine
- References
- Mayo Clinic Laboratories Histoplasma Antigen, Urine Clinical & Interpretive Information
- Synonyms
- Histoplasma capsulatum, Histoplasma galactomannan antigen, Histoplasma Polysaccharides, HSTQU
- Components
-
Code Name RUHSTR Histoplasma Ag Result, URN RUHSTV Histoplasma Ag Value, URN
Interpretation
- Method
Enzyme Immunoassay (EIA)
- Reference Range
- See individual components
- Ref. Range Notes
Reference Values:
Histoplasma Antigen Result: Not Detected Histoplasma Antigen Value: Not Detected Histoplasma Antigen Value Interpretation:
- Not Detected: No Histoplasma antigen detected. False-negative results may occur. Repeat testing on a new specimen should be considered if clinically indicated.
- Detected, <0.2 ng/mL: Histoplasma antigen detected below the limit of quantification (<0.2 ng/mL). Results should be correlated with clinical presentation, exposure history and other diagnostic procedures, including culture, serology, histopathology, and radiographic findings. False-positive results may occur in patients with other fungal infections, including Blastomyces.
- Detected: Histoplasma antigen detected. The reportable range of this assay is 0.2 to 25.0 ng/mL. Results should be correlated with clinical presentation, exposure history, and other diagnostic procedures, including culture, serology, histopathology, and radiographic findings. False-positive results may occur in patients with other fungal infections, including Blastomyces.
- Detected, >25 ng/mL: Histoplasma antigen detected above the limit of quantification (>25.0 ng/mL). Results should be correlated with clinical presentation, exposure history, and other diagnostic procedures, including culture, serology, histopathology, and radiographic findings. False-positive results may occur in patients with other fungal infections, including Blastomyces.
- Interferences and Limitations
Cautions:
Cross-reactivity with other fungal infections, including Blastomyces dermatitidis, may occur. Positive results should be correlated with other clinical and laboratory findings (eg, culture, serology).
Low-level positive titers may persist following resolution of infection and completion of appropriate treatment regimen.
Turbid urine specimens, containing excess protein, cells, or particulate matter, can inhibit the function of the test.
- References
- Mayo Clinic Laboratories Histoplasma Antigen, Urine Clinical & Interpretive Information
- Guidelines
Ordering & Collection
- Specimen Type
- Urine
- Collection
-
Collect 5 mL random urine in a sterile, screw-cap container (preservative-free).
- Handling Instructions
Outside Laboratories: Transfer 4 mL urine to a sterile, screw-capped vial and refrigerate. Specimen should not be centrifuged.
Stability: Refrigerated (preferred): 14 days; Frozen: 31 days; Ambient: 72 hours.
Reject Due To: gross hemolysis, turbid colored.
- Quantity
-
requested: 4 mL Urine
minimum: 2.5 mL Urine
Processing
- Processing
Transfer urine to a screw-capped vial and refrigerate. Do not centrifuge.
Sendouts:
- Order Mayo test: HSTQU.
- Interfaced: Yes.
Stability: Refrigerated (preferred): 14 days; Frozen: 31 days; Ambient: 72 hours.
Reject Due To: gross hemolysis, turbid colored.
Performance
- LIS Dept Code
- Sendouts Mayo Lab (RF) (MARF)
- Performing Location(s)
-
Sendout Mayo Clinic Laboratories (Superior Drive)
800-533-17103050 Superior Drive NW
Rochester, MN 55901 - Frequency
- Performed: Monday - Sunday. Report Available: 1-3 days.
- Available STAT?
- No
Billing & Coding
- CPT codes
- 87385
- LOINC
- 44524-7
- Interfaced Order Code
- UOW3887