Types of Pneumonia
Typical Versus Atypical Pneumonia
Healthcare providers used to separate community-acquired bacterial pneumonia into two groups: "typical" and "atypical." "Typical" bacteria include Streptococcus pneumoniae, Haemophilus influenzae, Staphylococcus aureus, Group A streptococci, and Moraxella catarrhalis, to a name a few. "Atypical" refers to pneumonia caused by Legionella pneumophila, Mycoplasma pneumoniae, and Chlamydophila pneumoniae.
There are, however, no routine exams or tests to distinguish pneumonia caused by atypical organisms from typical organisms. This is why these terms are not often used anymore.
Walking pneumonia refers to pneumonia that is mild enough so that you are not bedridden. In other words, you can still "walk around."
Double pneumonia refers to pneumonia affecting both the left and right lobes of the lungs.