Lower respiratory infection

A lower respiratory infection is an inflammatory infection affecting the airways and pulmonary parenchyma situated below the larynx, encompassing the trachea, bronchi, bronchioles, and alveoli It represents a clinical diagnostic category that primarily includes acute bronchitis, bronchiolitis, and pneumonia, caused by diverse viral, bacterial, or fungal pathogens

A lower respiratory infection is an inflammatory infection affecting the airways and pulmonary parenchyma situated below the larynx, encompassing the trachea, bronchi, bronchioles, and alveoli

It represents a clinical diagnostic category that primarily includes acute bronchitis, bronchiolitis, and pneumonia, caused by diverse viral, bacterial, or fungal pathogens Clinically, affected patients present with cough—frequently productive of sputum—along with dyspnea, fever, chest discomfort, wheezing, or abnormal lung sounds such as crackles and rhonchi, with potential progression to severe respiratory distress

Pathophysiologically, pathogen invasion and subsequent inflammatory host responses induce airway mucosal edema, epithelial necrosis, mucus hypersecretion, or alveolar exudative consolidation

Pathophysiologically, pathogen invasion and subsequent inflammatory host responses induce airway mucosal edema, epithelial necrosis, mucus hypersecretion, or alveolar exudative consolidation

Pathophysiologically, pathogen invasion and subsequent inflammatory host responses induce airway mucosal edema, epithelial necrosis, mucus hypersecretion, or alveolar exudative consolidation

Clinically, affected patients present with cough—frequently productive of sputum—along with dyspnea, fever, chest discomfort, wheezing, or abnormal lung sounds such as crackles and rhonchi, with potential progression to severe respiratory distress

Clinically, affected patients present with cough—frequently productive of sputum—along with dyspnea, fever, chest discomfort, wheezing, or abnormal lung sounds such as crackles and rhonchi, with potential progression to severe respiratory distress

Clinically, affected patients present with cough—frequently productive of sputum—along with dyspnea, fever, chest discomfort, wheezing, or abnormal lung sounds such as crackles and rhonchi, with potential progression to severe respiratory distress