Total complement activity

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Complement tests
C4 (C) FB (A) C3 CH50 Conditions
 · PSG, C3 NeF AA
 ·  · HA, C4D
 ·  ·  · TCPD
 · /↓ SLE

Total complement activity is a test performed to assess the level of functioning of the complement system.

The terms "CH50"[1] or "CH100" may refer to this test.

It identifies a reduction in function, but does not identify which specific component is involved.


  1. ^ Michael T. Lotze; Angus W. Thomson (2005). Measuring immunity: basic biology and clinical assessment. Academic Press. pp. 151–. ISBN 978-0-12-455900-4. Retrieved 3 December 2010.