Alternative Complement Pathway Activity (AH50)
Test Code
Alternative Complement Pathway Activity (AH50)
Description
Collect
Serum from a plain red top is the only acceptable sample type.
Gel barrier tubes are not acceptable.
Specimen Preparation
Allow blood to clot at room temp for 20 to 60 minutes. Centrifuge to thoroughly remove cells and immediately transfer cell-free serum to a fresh tube and freeze the cell-free serum on dry ice or at -70°C.
Preferred volume: 1 mL
Pediatric Collection
Minimum volume: 250 µL serum, frozen
Unacceptable Conditions
Thawed specimen.
Storage Transport Temp
Send frozen serum Priority Overnight via FedEx and in a well insulated container on dry ice.
Stability
Frozen at -70°C: 1 year
Reported
up to 4 weeks
Department
Complement LabSynonyms
Complement (Alternative Complement Pathway Activity);Hemolytic Assay (Alternative Complement Pathway Activity), & AM50
Related Tests
Primary Immunodeficiency Screen: Pneumococcal polysaccharide IgG antibody [12 serotypes] (PNU12), Diphtheria IgG antibody titer (DIPHT), Tetanus IgG antibody titer (TET), Lymphocyte enumeration, CDC panel [CD3/CD4, CD3/CD8, CD19, CD16/56] (TBCDC), CBC with automated diff (HCBC), Immunoglobulin A level (IGA), Immunoglobulin G level (IGG), Immunoglobulin M level (IGM), Total complement activity (CH50)
Complement Assessment: Total complement activity (CH50), Mannose binding lectin [MBL] level (MLEC)
Reference Interval
| Human Male | 77-159 |
| Human Female | 77-159 |
CPT Code
86162