Which of the following is caused by deficiency of complement C3 and C3b?
C1 inhibitor deficiency is associated with hereditary angioneurotic oedema. C3 deficiency is associated with severe recurrent pyogenic infection. Deficiency of C1 to C4 is associated with SLE Ref: Textbook of Microbiology by Ananthanarayanan, 6th Editio, Page 108.
Hereditary angioneurotic edema
SLE
Severe recurrent pyogenic infection
Collagen vascular disease