关键词: 钩端螺旋体病, 稻田型, 黄河流域

Abstract: Since 1992, outbreak of leptespirosis continuously occured in northern bank of Huanghe river in Henan province, The main epidemic characteristics were: 1. The major epidemic form was rice fieled type.The cases occured from July to November, and the epidemic peak period was in August. The incidence rate of the adult groups(>15 years) was signicantly higher than that of the young people(<15 years),and 97.5% cases were peasants. 2. 112 sera samples were examined by MA test,and the posi tive rate was 48. 15%. Of these positives, 75. 92% was icterohaemorrhagiae serogroups and 14. 82% was autumnalis serogroups.The possible infectious source of leptespirosis was Apodemus agrarius, and seven leptespira interrogans serovar icterohaemorrhagiae were isolated.3. The vaccine could reduce the morbidity of leptespirosis.