Among them,202 were normal human beings in forest region in forest region in Ninghua county and 12 were patients with fever, arthitis, neuropathy or dermal papule. And 20 serum for healthy people in Beijing were detected as negative control.

• 方法采用间接免疫荧光试验（IFA）对202全林区正常人血清及126例病人血清或脑脊液进行环状病毒igg和IgM抗体检测，以北京地区20例健康人血清为对照。