Home
HelpTest Code BLSAGSO Blastomyces Quantitative Antigen, Serum (316)
Additional Codes
Miravista Diagnostics Test Code: 316
Useful For
Aid in diagnosis of blastomycosis
Monitor the response to therapy and to determine when treatment can be modified or stopped.
Monitor Blastomyces antigen levels to help determine relapse of disease.
Synonyms/Keywords
Blastomyces Dermatitidis QNT AG
Specimen Requirements
| Specimen Type | Preferred Container/Tube | Acceptable Container/Tube | Specimen Minimum Volume (allows for 1 repeat) |
|---|---|---|---|
| Serum |
Red Top Tube (RTT) |
Serum Separator Tube (SST) | 0.8 mL |
| Plasma | EDTA Lavender Top Tube (LTT) |
Sodium-heparin OR Lithium-heparin Green Top Tube (GTT) OR Sodium citrate tube (BTT) |
0.8 mL |
Collection/Processing Instructions
Serum:
- Collect serum or plasma in serum separator (SST) or red top tube (RTT).
- Allow blood serum samples to clot for 30 minutes, then centrifuge.
- Pipette serum into a plastic leak-proof container.
Plasma:
- Collect plasma specimens in an EDTA, Heparin or Sodium Citrate tube.
- Centrifuge for 15 minutes and pipette plasma into a plastic screw cap vial.
Ship to arrive Monday through Friday using a next day delivery service.
Samples may be shipped on dry ice, frozen ice packs, or ambient.
Specimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Serum/Plasma | Room temperature | 14 days |
| Refrigerate (preferred) | 14 days | |
| Frozen | 2 months |
Rejection Criteria
- Cold or room temperature > 14 days old.
- Non-pipettable specimens, tissue, biopsy, sputum, bronchial brush, tracheal aspirate, FNA, bone marrow, aspirate or stool
- Samples in transport media, fixative of Isolator tubes.
Test Information
The MVista® Blastomyces Antigen Quantitative EIA can detect and quantify the amount of Blastomyces antigen in patient samples.
During validation testing, the sensitivity was found to be 95.00% and specificity 100% with an assay cutoff of 0.31 ng/mL.
Negative results do not exclude blastomycosis. Testing of both urine and serum offers the highest sensitivity. Failure of the antigen to rise does not exclude relapse.
Positive samples may require confirmation which could extend TAT.
Interpretations
None Detected: <0.31 ng/mL
Positive: 0.31 ng/mL 20.00 ng/mL
Positive Above the Limit of Quantifications
Results greater than 20.00 ng/mL fall outside the linear range of the assay. These results are positive, but not accurately quantifiable.
Results should be correlated with clinical presentation and history
Reference Range Information
Reference Interval: None Detected
Reportable Range: 0.31 ng/mL 20.00 ng/mL
Results above 20.00 ng/mL are reported as 'Positive, Above the Limit of Quantification'
When tested in cultures of 10⁵ – 10⁶ organisms/mL, cross-reactions occurred with Histoplasma spp., Coccidioides spp., Paracoccidioides brasiliensis, Talaromyces marneffei, Aspergillus nidulans, and Candida tropicalis.
Performing Laboratory Name
Miravista Diagnostics
Referral Laboratory Information
| Address | Telephone | Website Link | Marshfield Lab Account # |
|---|---|---|---|
|
4444 Decatur Blvd, Suite 300 Indianapolis, IN 46241 |
866-647-2847 | www.miravistalabs.com | MARSH |
Performing Information
| Performing Location | Day(s) Test Performed | Analytical Time | Methodology/Instrumentation |
|---|---|---|---|
| Miravista Diagnostics | Monday through Friday | 1 day |
Quantitative sandwich enzyme immunoassay (EIA) Serum is pre-treated to improve accuracy |
CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 87449 |
Outreach CPT Codes
| CPT | Modifier (if needed) |
Quantity | Description | Comments |
|---|---|---|---|---|
| 87449 |
Ordering Applications
| Ordering Application | Description |
|---|---|
| Cerner | Blastomyces Quantitative Antigen, Serum (316) |