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Lab Dept:
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Urine/Stool
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Test Name:
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BLASTOMYCES ANTIGEN, URINE
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General Information
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Lab Order Codes:
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BAG
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Synonyms:
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N/A
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CPT Codes:
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87449 – Infectious agent antigen detection by EIA technique
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Test Includes:
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Urine Blastomyces Antigen level reported in ng/mL.
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Logistics
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Test Indications:
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Aid in diagnosis of disseminated or acute pulmonary blastomycosis.
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Lab Testing Sections:
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Urine/Stool - Sendouts
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Referred to:
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Mayo Medical Laboratories (MML Test# 91407 forward to MiraVista Diagnostics)
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Phone Numbers:
Minneapolis:
Saint Paul:
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612-813-6280
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651-220-6550
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Test Availability:
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Daily, 24 hours, test performed Monday - Friday
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Turnaround Time:
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1 - 3 days
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Special Instructions:
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Use sterile collection technique.
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Specimen
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Specimen Type:
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Urine, random
Other specimen types tested: Bronchoalveolar Lavage (BALF) or Sterile Body Fluid
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Container:
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Sterile leak-proof container
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Draw Volume:
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2 mL (Minimum: 1.5 mL) urine or other acceptable specimen type
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Processed Volume:
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Same as Draw Volume
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Collection:
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Routine urine collection, or other appropriate collection technique. Maintain sterility during collection and forward promptly to the laboratory.
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Special Processing:
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Lab Staff: Mix random urine sample well. Remove aliquot into a plastic, 13 mL urine tube. Store and ship at refrigerated temperatures. Forward promptly.
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Patient Preparation:
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None
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Sample Rejection:
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Mislabeled or unlabeled specimens
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Interpretive
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Reference Range:
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ng/mL
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Result Interpretation
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None Detected
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Negative – Antigen not detected
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Below the Limit of Quantification
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Positive, Low – Antigen detected, below the limit of quantification
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0.2 – 1.9
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Positive, Low – Antigen detected, low concentration
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2.0 – 14.7
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Positive, Moderate – Antigen detected, moderate concentration
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Above the Limit of Quantification
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Positive, High – Antigen detected, above the limit of quantification
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Note: A change of 2 ng/mL or more compared to the prior specimen is significant, and should be considered in conjunction with clinical and other laboratory findings in deciding if the patient is not responding.
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Test performed by:
MiraVista Diagnostics
444 Decatur Blvd., Suite 300
Indianapolis, IN 46241
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Critical Values:
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N/A
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Limitations:
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Heterophile antibodies and rheumatoid factor can cause positive interference. Cross-reactions due to closely related antigenic epitopes are seen in patients with histoplasmosis, paracoccidioidomycosis, and penicilliosis. Rare cross-reactions have been seen in patients with aspergillosis and cryptococcosis.
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Methodology:
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EIA (Enzyme Immunoassay)
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References:
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Mayo Medical Laboratories February 2011
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Updates:
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7/2/2009: Added other specimen types (BALF, other sterile body fluids)
2/8/2011: Units change, previously reported as EIA Units. Reference range update.
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