What Causes Pneumonia In The Lungs?

5 primary causes of pneumonia

• Bacterial Infections: Bacteria, such as Streptococcus pneumoniae, Haemophilus influenzae, and Mycoplasma pneumoniae, are common culprits behind bacterial pneumonia. These bacteria can infect the lungs and cause inflammation and fluid buildup.
• Viral Infections: Viruses, including the influenza virus (flu), respiratory syncytial virus (RSV), and the SARS-CoV-2 virus responsible for COVID-19, can lead to viral pneumonia. Viral pneumonia is typically less severe than bacterial pneumonia but can still be dangerous, especially in certain populations.
• Fungal Infections: Fungi like Pneumocystis jirovecii and Histoplasma capsulatum can cause fungal pneumonia, often affecting individuals with weakened immune systems, such as those with HIV/AIDS or undergoing chemotherapy.
• Aspiration: Aspiration pneumonia occurs when foreign substances, such as food, saliva, or vomit, are inhaled into the lungs, leading to infection and inflammation. This type of pneumonia is more common in people with impaired swallowing reflexes or those who have experienced a stroke or neurological conditions.
• Chemical Irritants: Inhaling harmful chemical irritants, such as toxic fumes, gases, or certain chemicals, can cause chemical pneumonia. This type of pneumonia results from the lung’s reaction to the irritants, leading to inflammation and lung damage.