Lung Infections

Lung infections encompass a broad spectrum of illnesses affecting the respiratory system, involving the airways and lung tissues. Common types of lung infections include bronchitis, pneumonia, and bronchiolitis. These infections can be caused by various pathogens, including bacteria, viruses, fungi, and parasites. Bacterial pneumonia, often caused by Streptococcus pneumoniae or Haemophilus influenzae, is characterized by inflammation and consolidation of lung tissue, leading to symptoms such as cough, fever, and difficulty breathing. Viral infections, like influenza and respiratory syncytial virus (RSV), primarily affect the upper and lower respiratory tract, causing symptoms such as nasal congestion, cough, and sometimes pneumonia. Clinical features of lung infections vary based on the specific type and causative agent. Common symptoms include cough, shortness of breath, chest pain, and fever. Severe cases may lead to respiratory distress, cyanosis, and complications such as pleural effusion or abscess formation. Diagnosis involves clinical evaluation, chest X-rays, laboratory tests, and, in some cases, molecular testing for viral pathogens.