title: Effect of previous antimicrobial therapy on bacteriological findings in patients with primary pneumonia.
mesh_terms: D000900:Anti-Bacterial Agents / Q000494:pharmacology* / Q000627:therapeutic use; D001419:Bacteria / Q000187:drug effects; D004926:Escherichia coli / Q000302:isolation & purification; D006193:Haemophilus influenzae / Q000302:isolation & purification; D006801:Humans; D007709:Klebsiella / Q000302:isolation & purification; D011014:Pneumonia / Q000000981:diagnostic imaging / Q000188:drug therapy / Q000382:microbiology*; D011446:Prospective Studies; D011550:Pseudomonas aeruginosa / Q000302:isolation & purification; D011859:Radiography; D013183:Sputum / Q000382:microbiology*; D013210:Staphylococcus / Q000302:isolation & purification; D013291:Streptococcus / Q000302:isolation & purification
chemical_list: D000900:Anti-Bacterial Agents