https://images.slideplayer.com/27/9175181/slides/slide_8.jpg An infection caused by the bacterium Coxiella burnetii. Q fever is spread to humans by animals, most commonly sheep, goats, and cattle. It's caused by inhaling dust particles contaminated by infected animals. High-risk occupations include farming, veterinary medicine, and animal research. When symptoms occur they include fever, cough, nausea, and fatigue. Q fever is treated with an antibiotic.