Blastomyces dermatitidis Antibodies by Immunodiffusion, Serum

Casandra

Casandra Test Code AR02549Version 1 (DRAFT)

Performing Lab

Lab ARUP LaboratoriesLab Test ID 0050172CPT Code 86612

Blastomyces dermatitidis Antibodies by Immunodiffusion, Serum

Also known as: BLASTO PPT

Clinical Use

Order Test

Use

The test is used to detect antibodies against Blastomyces dermatitidis in patient's serum using the immunodiffusion method. A positive result may indicate a recent or active infection. It is not recommended to be used as a standalone test; for comprehensive serologic testing, the Blastomyces dermatitidis Antibodies by Immunoassay with Reflex to Immunodiffusion, Serum (3000236) is suggested. For diagnosis of blastomycosis, this test should be considered in conjunction with histology or culture.

Special Instructions

This immunodiffusion test specifically detects total antibodies to the 'A' antigen of Blastomyces dermatitidis. The test is performed from Sunday to Saturday, with a reported time of 3-6 days. It is New York state approved and the test code is 0050172. Ensure the serum is separated from cells ASAP, or within 2 hours of collection.

Limitations

This test is not intended to serve as a standalone diagnostic tool for Blastomyces and should not be solely relied upon to diagnose Blastomycosis. A negative result does not exclude the possibility of Blastomyces infection as the test only detects antibodies to the 'A' antigen and may miss antibodies to other antigens. Additionally, false positives or cross-reactivity may occur, and the test's sensitivity and specificity are not disclosed. Clinicians should interpret results in conjunction with clinical assessment and other diagnostic information.

Test Details

FDA Approved

New York Approved

Methodology

Immunoassay (Immunodiffusion)

Biomarkers

Blastomyces dermatitidis 'A' antigen

Protein

Presence of Antibodies • Expression • Categorical (e.g., Positive / Negative / Indeterminate)

LOINC Codes

Result Codes

5058-3

Result Turnaround Time

3-6 days

Specimen

Serum

Volume

0.5 mL

Minimum Volume

0.15 mL

Container

ARUP Standard Transport Tube

Collection Instructions

Use a serum separator tube for collection. Separate serum from cells ASAP or within 2 hours of collection. Transfer required volume to the transport tube.