Q fever.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000382:Agricultural Workers' Diseases / Q000175:diagnosis; D002648:Child; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D011778:Q Fever / Q000175:diagnosis*; D012281:Rickettsia / Q000302:isolation & purification; D012698:Serologic Tests