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HelpTest Code AJO Jo-1 Antibody, Serum
Additional Codes
Epic Code
LAB770
Performing Laboratory
Bronson Methodist Hospital Laboratory
Reference Values
<1.0 AI (Antibody Index) = Negative
>1.0 AI (Antibody Index) = Positive
Antibodies to Jo-1 are present in 20-55% of cases with poly-dermatomyositis.
Specimen Requirements
Specimen Type: Serum
Container/Tube: Gold top serum
gel-Plain,
red-top tube is also acceptable.
Specimen Volume: 1 mL
Specimen Minimum Volume: 0.5 mL
Specimen Collection and Handling:
Separated serum/plasma should remain at 22 ͦC for no
longer than eight hours. If assays will not be completed
within eight hours, serum/plasma should be refrigerated
(2-8 ͦC). For storage beyone 72 hours, freeze
sample at -20 ͦC. Avoid repeated freezing and
thawing.
Specimen Transport Temperature
Refrigerate
Day(s) Test Set Up
Monday through Friday
Test Classification and CPT Coding
86235
Methodology
Multiplex flow immunoassay
Please see the January 2019 LabWire link under the "Resources" section of this page for infomation on methodology change and the Connectiive Tissue Disease cascade.