title: Complement in host defense.
mesh_terms: D001419:Bacteria / Q000276:immunology; D003167:Complement Activation; D003169:Complement Inactivator Proteins; D003170:Complement Pathway, Alternative; D003171:Complement Pathway, Classical; D003165:Complement System Proteins / Q000172:deficiency / Q000235:genetics / Q000276:immunology*; D006801:Humans; D007109:Immunity; D007153:Immunologic Deficiency Syndromes / Q000235:genetics / Q000276:immunology; D007239:Infections / Q000276:immunology; D010272:Parasitic Diseases / Q000276:immunology; D014780:Viruses / Q000276:immunology
chemical_list: D003169:Complement Inactivator Proteins; D003165:Complement System Proteins