Table 3

 Microbiological findings (rhinovirus, Bordetella pertussis and Chlamydia pneumoniae) in different fractions of induced sputum and nasopharyngeal swabs

Rhinovirus(N = 133)Bordetella pertussis (N = 127)Chlamydia pneumoniae (N = 130)
NT, not tested.
*Positivity rate for B pertussis in pharyngeal swab and cellular fraction (p = 0.001, McNemar test), supernatant or pharyngeal swab (0 = 0.017, McNemar test).
Pharyngeal swabNT22 (17.3%)*6 (4.9%)
Induced sputum, supernatant6 (4.5%)8 (6.3%)*14 (11.1%)
Induced sputum, cellular fraction11 (8.3%)5 (3.8%)*17 (13.1%)