Varicella arthritis.
D001170:Arthritis, Infectious / Q000175:diagnosis / Q000209:etiology*; D002644:Chickenpox / Q000150:complications*; D002675:Child, Preschool; D005260:Female; D005500:Follow-Up Studies; D006566:Herpesviridae Infections / Q000175:diagnosis; D014645:Herpesvirus 3, Human / Q000302:isolation & purification; D006801:Humans; D007719:Knee Joint; D009174:Mycoplasma / Q000302:isolation & purification