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What are the signs and symptoms of Q fever?
About half of all people who are infected with the bacterium that causes
Q fever have no symptoms at all. When the acute form of Q fever does cause
symptoms, the symptoms can vary from person to person. Most often, people will
suddenly develop flu-like symptoms, including fever (as high as 104 F-105 F),
chills, muscle and joint aches, severe headache, nausea, vomiting, diarrhea,
cough, rash, and chest or abdominal pain. These symptoms may last up to a few
weeks. The chronic form of Q fever, which occurs in only about 5% of those
people infected, most often causes an inflammation of the valves inside the
heart called endocarditis. The symptoms of endocarditis can include fever, night
sweats, shortness of breath, muscle and joint aches, edema (swelling of the
legs), and rash.