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Table 3 Samples where nucleic acids (RNA or DNA) to infectious organisms were identified

From: PCR based bronchoscopic detection of common respiratory pathogens in chronic cough: a case control study

   Chronic cough  
  Healthy volunteers All patients Lymphocytes <10% Lymphocytes >20% P
RSV - - - - ns
hMPV - - - - ns
Influenza A & B 1 positive - - - ns
PIV - - - - ns
HCoV - - - - ns
Rhinovirus - - - - ns
EBV - 2 positive - 2 positive ns
HBoV - - - - ns
Adenovirus 1 positive - - - ns
Chlamydophila sp. 3 positive 2 positive 2 positive - ns
Mycoplasma pn. - - - - ns
VZV - - - - ns
  1. There was no overall significant difference between healthy volunteer and chronic cough groups (Fisher’s exact test). Ns = not significant (p > 0.05, Fisher’s exact test). RSV = respiratory syncytial virus, hMPV = human metapneumovirus, PIV = parainfluenza virus, HCoV = human coronavirus, EBV = Epstein-barr virus, HBoV = human bocavirus, VZV = varicella zoster virus.