Pneumonia Early Classification

Pneumonia can be classified into four main types due to anatomic and/or pathologic appearance of the lung, either its diagnosed by direct inspection at autopsy or by it's appearance under a microscope:

1. A lobar pneumonia is an infection that only involves a single lobe, or section, of a lung. Lobar pneumonia is often due to Streptococcus pneumoniae (though Klebsiella pneumoniae is also possible.)
2. Multilobar pneumonia involves more than one lobe, and it often causes a more severe illness.
   
3. Bronchial pneumonia affects the lungs in patches around the tubes (bronchi or bronchioles).
4. Interstitial pneumonia involves the areas in between the alveoli, and it may be called "interstitial pneumonitis." It is more likely to be caused by viruses or by atypical bacteria.

Pathology classification, Microbiology classification and Radiology classification can be classified into one classification that is Pneumonia early classification.

Main Article: Pneumonia Types and Classification