Abbreviations: HPI = Haemophilus
parainfluenzae; NTHI = nontypeable Haemophilus
influenzae; OMP = outer membrane protein
role of Haemophilus parainfluenzae (HPI) in COPD infection
is unclear, in contrast to the accepted pathogenicity of its close
relative nontypeable Haemophilus influenzae (NTHI). We have
examined the incidence of HPI in patients with COPD and assessed its
interaction with host defense systems and with respiratory epithelium.