Atypical pneumonia- causes

1. Mycoplasma:

M. pneumoniae

2. Chlamydophila:

C.psittaci, C.pneumoniae

3. Bacteria:

Legionella spp., F. tularensis, Y.pestis, B.anthracis

4. Fungi:

Histoplasma, Blastomyces, Coccidiodes, Pneumocystis

5. Aspiration pneumonitis:

Sterile or mixed upper respiratory and oral flora

6. Viral agents:

Influenza, adenovirus, respiratory syncitial virus, parainfluenza virus, metapneumovirus, varicella zoster, measles, EBV, CMV, Hantavirus

7. Rickettsia:

C. burnetti

REFERENCE: Fishman’s 6th edition, pg no-2120