The positive outcome of serologic examination in PS consisted of 4 cases in coxsackie virus-IgM,1 case in EB virus-IgM,1 case in herpes simplex virus-IgM and 1 case in mycoplasma-IgM.

• 血清学检查发现柯萨奇病毒IgM阳性4例,EB病毒、单纯疱疹病毒、支原体IgM阳性各1例。