title: Complement and host defense against infection.
mesh_terms: D000293:Adolescent; D000755:Anemia, Sickle Cell / Q000276:immunology; D002097:C-Reactive Protein / Q000502:physiology; D002675:Child, Preschool; D003165:Complement System Proteins / Q000378:metabolism / Q000502:physiology*; D004789:Enzyme Activation; D005260:Female; D006801:Humans; D007111:Immunity, Cellular; D007153:Immunologic Deficiency Syndromes / Q000151:congenital; D007231:Infant, Newborn; D007239:Infections / Q000276:immunology*; D008070:Lipopolysaccharides / Q000502:physiology; D008180:Lupus Erythematosus, Systemic / Q000276:immunology; D008297:Male; D011414:Properdin / Q000378:metabolism / Q000502:physiology; D014777:Virus Diseases / Q000276:immunology
chemical_list: D008070:Lipopolysaccharides; D011414:Properdin; D003165:Complement System Proteins; D002097:C-Reactive Protein