Total complement activity

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

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 is a measure of serum's ability to lyse 50% of antibody-coated red blood cells.

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

References

↑ 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.

Medical tests: Immunologic techniques and tests (CPT 86000–86849)

Immunologic techniques
and tests

serology/
diagnostic immunology

Immunoprecipitation	Chromatin immunoprecipitation Immunodiffusion Ouchterlony double immunodiffusion Radial immunodiffusion Immunoelectrophoresis Counterimmunoelectrophoresis

Immunoassay	ELISA ELISPOT Enzyme Multiplied Immunoassay Technique RAST test Radioimmunoassay Radiobinding assay Immunofluorescence

Agglutination	Hemagglutination/Hemagglutinin Coombs test Latex fixation test

Other	Nephelometry Complement fixation test Immunocytochemistry Immunohistochemistry Direct fluorescent antibody Epitope mapping Skin allergy test Patch test

Inflammation

CBC
- lymphocyte count

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