title: Pneumococcal typing and the problem of endogenous or exogenous reinfection in chronic bronchitis.
mesh_terms: D000667:Ampicillin / Q000627:therapeutic use; D001991:Bronchitis / Q000188:drug therapy / Q000382:microbiology*; D002701:Chloramphenicol / Q000627:therapeutic use; D002908:Chronic Disease; D006193:Haemophilus influenzae / Q000302:isolation & purification; D006801:Humans; D011008:Pneumococcal Infections / Q000382:microbiology*; D012703:Serotyping; D013183:Sputum / Q000382:microbiology; D013291:Streptococcus / Q000302:isolation & purification; D013296:Streptococcus pneumoniae / Q000145:classification; D013449:Sulfonamides / Q000627:therapeutic use; D013752:Tetracycline / Q000627:therapeutic use
chemical_list: D013449:Sulfonamides; D002701:Chloramphenicol; D000667:Ampicillin; D013752:Tetracycline