Table 2

Microorganisms isolated in respiratory samples using different procedures

PS (n=71)S (n=42)PSB (n=75)BAL (n=59)
Results are expressed as n (%). n=number of patients in whom the procedure was performed.
PS=pharyngeal swabs; S=sputum; PSB=protected specimen brush; BAL=bronchoalveolar lavage; PPMs=potential pathogenic microorganisms; non-PPMs=non-potential pathogenic microorganisms.
PPMs13 (18)22 (52)46 (61)33 (56)
    H influenzae3 (4)11 (26)24 (32)19 (32)
    H parainfluenzae1 (1)
    M catarrhalis2 (5)3 (4)
    S pneumoniae2 (3)6 (14)6 (8)4 (7)
    S aureus2 (3)2 (3)2 (3)
    Nocardiaspp1 (1)1 (2)
    E coli1 (2)1 (1)1 (2)
    Proteusspp1 (1)1 (2)1 (2)
    Enterobacterspp1 (2)
    P aeruginosa3 (4)1 (2)8 (11)5 (8)
    P aeruginosa mucoid strain3 (7)3 (4)1 (2)
    P fluorescens1 (1)1 (2)
    K pneumoniae1 (1)
    A xylosoxidans1 (1)1 (2)
    Aspergillusspp1 (1)1 (2)1 (1)1 (2)
Non-PPMs
    S viridans49 (69)23 (55)18 (24)14 (24)
    Corynebacteriumspp6 (8)1 (2)5 (7)1 (2)
    Coagulase negative staphylococcus1 (2)2 (3)2 (3)
    Neisseria spp50 (70)22 (52)10 (13)5 (8)
    Enterococcus spp1 (1)1 (2)
    Candida spp1 (1)1 (2)2 (3)