title: [Studies of polymicrobial infection in chronic lower airway infections by transtracheal aspiration].
mesh_terms: D001707:Biopsy, Needle / Q000379:methods; D001991:Bronchitis / Q000382:microbiology*; D006193:Haemophilus influenzae / Q000302:isolation & purification; D006801:Humans; D013296:Streptococcus pneumoniae / Q000302:isolation & purification