Q feverQ fever
a mild illness characterized by fever, headache, muscular pains, and pneumonia, transmitted by contact or ticks, and caused by a rickettsia (Coxiella burnetii)
Origin of Q fever; from q(uery): so named because of many unanswered questions about the disease when first identified
An infectious disease caused by the rickettsia Coxiella burnetii that is characterized by fever, malaise, and muscular pains.
Origin of Q feverq(uery) (because originally the infectious agent was unknown) + fever.