Days Set Up
Monday - Friday, 8:00am - 4:30pm
Analytic Time

5 days

MiChart Code
Soft Order Code

Test Updated:


Bird Shot Retinopathy
Bird Shot Retinopathy - HLA A29
A29 Antigen
HLA A-29
HLA Class I One Locus (Low Resolution)

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Test Overview

Test Methodology

Molecular Typing (SSOP)

Test Usage

Birdshot retinopathy is a rare form of posterior uveitis and accounts for 1-3% of uveitis cases in general. Birdshot retinopathy causes severe, progressive inflammation of both the choroid and the retina. Birdshot retinopathy is the disease with the strongest association to a HLA class I antigen, with more than 95% of patients carrying the HLA-A29 antigen. HLA-A*29:02, which is the most frequent A29 allele in the Caucasian population is also the allele most frequently associated with Birdshot retinopathy in Caucasians. The disease has however been observed in HLA*29:01 Caucasian patients.

Reference Range

Interpretive report will indicate presence or absence of HLA-A29.

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Specimen Requirements


Collect specimen in sufficient yellow top (ACD) solution A or EDTA tubes early in the day. Send intact specimen at room temperature. Do not refrigerate or freeze.

Normal Volume
10 mL ACD (solution A) or EDTA whole blood; additional specimen may be required for patients with extremely low white cell counts.
Minimum Volume
5 mL ACD (solution A) or EDTA whole blood; additional specimen may be required for patients with extremely low white cell counts.

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Our High Standard

Quality that sets us apart

As the reference laboratory division of Michigan Medicine's Department of Pathology, MLabs shares the institution's commitment to applying established quality principles to clinical laboratory testing. Like other large organizations in complex, consequential fields, we rely on an established approach to monitor quality throughout the testing process.