gram-negative_bacterial_infectious_disease zoonotic_infectious_disease obsolete Coxiella burnetii pneumonia true disease_ontology A Q fever that is a zoonotic infectious disease caused by Coxiella burnetii, a bacterium which affects both humans and animals. The symptoms include fever, headache, cough, pleuritic chest pain, myalgia and arthralgia. Infection of humans usually occurs by inhalation of these organisms from air that contains airborne barnyard dust contaminated by dried placental material, birth fluids, or excreta of infected herd animals, ingestion of contaminated milk, tick bites and human to human transmission. DOID:0050220 Q fever pneumonia