title: Penicillin resistance of pneumococci and immune deficiency.
mesh_terms: D000328:Adult; D002353:Carrier State / Q000276:immunology / Q000382:microbiology*; D002648:Child; D002675:Child, Preschool; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D007153:Immunologic Deficiency Syndromes / Q000382:microbiology*; D008297:Male; D010403:Penicillin Resistance; D010406:Penicillins / Q000627:therapeutic use*; D011018:Pneumonia, Pneumococcal / Q000382:microbiology*; D013296:Streptococcus pneumoniae / Q000187:drug effects*
chemical_list: D010406:Penicillins