UW Hospital and Clinics Lab Test Directory
| Test Name: |
|
Histoplasma Ag
|
|
|
|
|
|
|
| Test Code(s): |
|
HISTAG / HCHISTAG
|
|
|
|
|
|
|
| CPT Code(s): |
|
87385
|
|
|
|
|
|
|
| Methodology: |
|
Enzyme Immunoassay
|
|
|
|
|
|
|
| Clinical Significance: |
|
May be used as an aid in rapid diagnosis of disseminated or acute pulmonary histoplasmosis.
This assay detects Histoplasma capsulatum antigen.
|
|
|
|
|
|
|
| Testing Site: |
|
Testing will be sent to an approved reference laboratory.
|
|
|
|
|
|
|
| Days Performed: |
|
Mon-Fri.
|
|
|
|
|
|
|
| Turnaround Time: |
|
Routine: 1 week.
|
|
|
|
Specimen Requirements
|
|
|
|
| Collection Instructions: |
|
BAL: Sterile screw cap container
Blood: 9 mL red top or green top tube
Body Fluid: Sterile screw cap container
CSF: Numbered specimen tube from sterile disposable
lumbar puncture tray
Urine: Sterile screw cap container
|
|
|
|
|
|
|
| Volume Required: |
|
Preferred: 4 mL
Pediatrics: 2 mL
|
|
|
|
|
|
|
| Specimen Processing: |
|
Blood: Centrifuge. Transfer cell-free serum to plastic vial. Refrigerate.
Other specimen types: Refrigerate.
|
|
|
|
|
|
|
| Specimen Transport: |
|
Transport specimen to laboratory. Transport with coolant pack if coming from outreach location.
|
|
|
|
|
|
|
| Stability: |
|
Ambient: 7 days
Refrigerated: 30 days
Frozen: Indefinitely
|
|
|
|
Interpretation
|
|
|
|
| Test Limitations: |
|
Cross reactions may occur with blastomycosis, coccidioidomycosis, paracoccidioidomycosis, and penicilliosis marneffei, and rarely in aspergillosis.
Sputolysin and NaOH are both interfering substances.
|
|
|
|
|
|
|
Histoplasma Ag
Histoplasma antigen
h capsulatum
|
