Investigating an undetectable total complement level and investigating individuals with increased susceptibility to bacterial infections. Patients with C5 deficiency haved a marked increase in the incidence of autoimmune disorders and have increased susceptibility to bacterial infection. Congenital deficiency patients have values near zero.
10.6 - 26.3 mg/Dl
* Reference ranges may change over time. Please refer to the original patient report when evaluating results.
The molecule may be dysfunctional with normal values but with ineffective white cell chemotaxis.
Days Test Performed
Monday - Saturday
2 - 4 days
Soft Order Code
C5 Complement, Antigen
Fifth Component of Complement
C5 COMPLEMENT, ANTIGEN, SERUM
Mayo C5AG (9266)
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Offsite Collection Instructions
Collect blood in a red top or SST tube from a fasting patient. Centrifuge, aliquot serum into plastic vial and freeze.
1 mL serum
0.5 mL serum
The Complement, Total Hemolytic (CH50) assay should be used as a screen for suspected complement deficiencies before ordering individual complement component assays. A deficiency of an individual component of the complement cascade will result in an undetectable total complement level. Test sent to Mayo Medical Laboratories.