title: Sickle-cell disease and the properdin system.
mesh_terms: D000367:Age Factors; D000755:Anemia, Sickle Cell / Q000150:complications / Q000276:immunology*; D000907:Antibodies, Bacterial / Q000032:analysis; D001424:Bacterial Infections / Q000209:etiology; D002118:Calcium; D002675:Child, Preschool; D003165:Complement System Proteins; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000209:etiology; D008274:Magnesium; D009895:Opsonin Proteins; D010587:Phagocytosis; D011414:Properdin; D011485:Protein Binding; D013296:Streptococcus pneumoniae / Q000276:immunology
chemical_list: D000907:Antibodies, Bacterial; D009895:Opsonin Proteins; D011414:Properdin; D003165:Complement System Proteins; D008274:Magnesium; D002118:Calcium