Dynamics of Bacterial Colonization With Streptococcus pneumoniae Haemophilus influenzae and Moraxella catarrhalis During Symptomatic and Asymptomatic Viral Upper Respiratory Tract Infection

摘要

BackgroundVirus is detected in about 80% of upper respiratory tract infections (URTIs) in children and is also detectable in the nasopharynx of 30% of asymptomatic children. The effect of asymptomatic viral infection on the dynamics of bacterial density and colonization of the nasopharynx has not been reported. The current study was performedto assess the presence and density of Streptococcus pneumoniae, Haemophilus influenzae, and Moraxella catarrhalis in the nasopharynx of 4–7-year-old children during URTI and when well.