The diagnostic tests used to diagnose a<unk>  include: * CH50 measurement * Immunochemical methods/test * C3<unk>  screening * Mannose-binding lectin (lab study) * Plasma levels/regulatory proteins (lab study) Types * Disorders of the proteins that act to inhibit the<unk>  system (such as C1-inhibitor) can lead to an overactive response, causing conditions such as hereditary angioedema. * Disorders of the proteins that act to activate the<unk>  system (such as C3) can lead to an underactive response, causing greater susceptibility to infections.
Complement deficiency
Complement 2 deficiency
Complement 3 deficiency
Terminal complement pathway deficiency
IgG deficiency
T cell deficiency
Neutrophil-specific granule deficiency
Leukocyte adhesion deficiency