title: [Refractory respiratory tract infections. 6. New problems in refractory respiratory tract infections. a. Changes in pathogens and chemotherapy after development of the third generation of cephalosporins].
authors.forename: A
authors.initials: A
authors.lastname: Saito
mesh_terms: D001419:Bacteria / Q000187:drug effects / Q000302:isolation & purification*; D002511:Cephalosporins / Q000494:pharmacology / Q000627:therapeutic use*; D004352:Drug Resistance, Microbial; D006801:Humans; D012141:Respiratory Tract Infections / Q000188:drug therapy / Q000382:microbiology*; D013997:Time Factors
chemical_list: D002511:Cephalosporins