Q fever natural history, complications, and prognosis

Overview
Q fever is caused by infection with Coxiella burnetii. This organism is uncommon but may be found in cattle, sheep, goats and other domestic mammals, including cats and dogs.

Prognosis
Coxiella burnetii is a highly infectious agent that is rather resistant to heat and drying. It can become airborne and inhaled by humans. A single C. burnetii organism may cause disease in a susceptible person. This agent could be developed for use in biological warfare and is considered a potential terrorist threat.

Possible complications
Rarely, a heart infection results that can lead to severe symptoms or even death if untreated. Other complications can include:
 * Bone infection (osteomyelitis)
 * Brain infection (encephalitis)
 * Liver infection (chronic hepatitis)
 * Lung infection (pneumonia)