id author title date pages extension mime words sentences flesch summary cache txt cord-019089-oots4fe4 Laya, Bernard F. Infections 2013-08-31 .txt text/plain 5442 322 37 Imaging can also help evaluate complications to pneumonia and exclude other causes of respiratory distress including underlying developmental anomalies, foreign body, gastroesophageal reflux disease, and aspiration. Viruses are the most frequent cause of community-acquired pneumonia in infants older than 4 months and in preschool-aged children, with respiratory syncytial virus (RSV) being the most common. For school-aged children (6-16 years old), the incidence of bacterial infections from Streptococcus increases, although viral disease remains the most common cause (Condon 1991 ; Ostapchuk et al. Mycoplasma pneumoniae causes 30 % of lower respiratory tract infections in school-aged children (Condon 1991 ; Donnelly 2001 ) . However, lung parenchymal, pleural, and lymph node infl ammatory abnormalities can be visualized and characterized by MRI in children with pulmonary infections. Swine-origin infl uenza A (H1N1) viral infection in children: initial chest radiographic fi ndings ./cache/cord-019089-oots4fe4.txt ./txt/cord-019089-oots4fe4.txt