Classification of respiratory tract infections Upper respiratory tract infection Definition Otitis media Coryza/col Epiglottis Pneumonia is the inflammation of lower Airway infections Acute bronchitis respiratory tracts including Acute exacerbation of chronic bronchitis alveoli. interstitial tissues Cystic fibrosis and broncioles by the Parenchymal infections Pneumonia microorganisms, chemical Lung abscess irritations or by an immunological process 2021/2/23 Dr HU Bijie Empyema2021/2/23 Dr.HU Bijie 7 Definition • Pneumonia is the inflammation of lower respiratory tracts including alveoli, interstitial tissues, and broncioles by the microorganisms, chemical irritations or by an immunological process