Of 45 amples from those patients ,their onset dates were within 3 days,8 samples were positive and positive rate was 17.8% by IGSS/RCM.

• 其中发病3日内的钩体病人血标本45份，阳性率17.；8%25，与血培养阳性率相当，显著高于显微镜凝集试验阳性率6