title: Complete absence of the third component of complement in a patient with repeated infections.
mesh_terms: D001424:Bacterial Infections / Q000150:complications; D002648:Child; D003176:Complement C3 / Q000172:deficiency*; D005260:Female; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000150:complications / Q000235:genetics*; D008297:Male; D010375:Pedigree; D010641:Phenotype
chemical_list: D003176:Complement C3