Hemorrhagic pneumonia

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Hemorrhagic pneumonia refers to a descriptive term for pneumonia (infective - inflammatory consolidation of the lung) when is complicated by pulmonary hemorrhage. It can be localized or diffuse to varying degrees dependent on the extent of involvement +/- etiological agent.

Pathology

The precipitation of hemorrhagic pneumonia can occur due to a number of factors including host as well as organism factors. These include:

Host factors

coagulopathy
medications: anticoagulants

Infective agents: some are more likely than others and include

concomitant with Chlamydia pneumoniae and parainfluenza virus 4 pneumonia
Staphylococcus aureus pneumonia
Stenotrophomonas maltophilia pneumonia
group A streptococcal pneumonia
influenza virus: rare
pulmonary leptospirosis: rare