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
2 - 7 days
- Complement AH50
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.
Test sent to Mayo Medical Laboratories.