C1q Levels

Test investigation

C1q Levels

Laboratory offering test

Referral laboratory


C1q initiates the classical complement pathway. Deficiency is rare but may present with SLE, recurrent bacterial infections, glomerulonephritis and a low CH50. C1Q levels should be measured in acquired angioedema. Anti C1q antibodies are associated with Lupus Nephritis and Urticarial Vasculitis. Referred outside of EPA

Comments precautions

Plasma NOT acceptable Referred outside of EPA

Sample type


Turnaround times (TAT) Urgent/Routine/GP or OPD

2 weeks