Aseptic meningitis due to echovirus type 9.
D000293:Adolescent; D002648:Child; D002675:Child, Preschool; D004457:Echovirus Infections; D029822:Enterovirus B, Human / Q000302:isolation & purification*; D005260:Female; D006801:Humans; D007223:Infant; D008297:Male; D008581:Meningitis / Q000209:etiology*; D014776:Virus Cultivation