Causes of Pneumonia

Pneumonia is mainly caused by these types of germs. 

  • Virus
  • Bacteria
  • Mycoplasma
  • Fungi
  • Various chemicals

Viral pneumonia means viruses attack upper respiratory tract and cause pneumonia. It happens more often in children than adults. Most of viral pneumonia are not severe and will recover in 7-10 days. But viral pneumonia caused by influenza virus can be severe and even fatal. Influenza virus invades the lungs, and make the lungs filled with fluid. Such virus include H1N1H3N2H5N1H7N9, etc. 

Bacterial pneumonia can attack anyone at any age. People with weakened immunity are at greatest risk, i.e. people with respiratory infection, people with viral pneumonia, people recovering from severe disease or surgery. Especially, people who have viral pneumonia might develop bacterial pneumonia. 

Among all bacterial pneumonia, pneumococcal pneumonia is the most common in the United States. Every year 900,000 Americans are affected by pneumococcal pneumonia.  Children under 5 years old and the elder over 65 years old are highly recommended to take vaccination, the pneumococcal vaccination will help them against Streptococcus. 

Mycoplasma Pneumonia Mycoplasma is the smallest germ in the world. It’s neither bacteria nor virus but has traits of both. Mycoplasma pneumonia is usually mild, as long as patients get treatment in time they should be okay. It can affect all age groups, but more often with children and young adults. 

Fungal pneumonia affect people with impaired immunity, e.g. HIV carriers.. For normal people, fungal pneumonia is rare. There’s a special type of fungal pneumonia that people hear about a lot, that’s TB (tuberculosis). TB is severe disease and has to be treated since early stage. Otherwise, it can be dangerous. 

Aspiration pneumonia some chemicals or bacteria when entering lung cause pneumonia. Such bacteria doesn’t cause disease when they’re in the mouth, but cause serious problem in lungs. It might further develop bacterial pneumonia. Aspiration pneumonia occurs on alcoholic or people with difficulty swallowing. 

 

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