2 - 7 days
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Enzyme-Linked Immunosorbent Assay (ELISA)
The AH50 assay is a useful screening tool for homozygous deficiencies of Alternative Pathway components including C3, factor I, factor B, properdin, factor H and factor D.
> or = 45% of normal
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
Collect specimen in a red top tube from a fasting patient do not use SST tube. Send to Specimen Perocessing in a green bag. Must be spun within 30 minutes.
Collect specimen in a red top tube from a fasting patient; do not use SST tube. Centrifuge, aliquot serum into a plastic vial and freeze within 30 minutes.