钩端螺旋体病历史疫区人与家畜隐性感染调查

Studies on Inapparent Infection of Villagers and Domestic Animals in Historic Focus of Leptospirosis

对山西省襄汾县古城乡钩端螺旋体病历史疫区人与家畜钩端螺旋体隐性感染进行调查，结果表明：健康人群钩端螺旋体隐性感染率２．０６％；猪隐性感染率８．００％，牛未检出。古城乡曾于１９７６、１９７９年发生由猪作为主要传染源的洪水型和雨水型钩端螺旋体病暴发流行，虽然在其后的１５年中无人间钩端螺旋体病发生，但猪的感染率仍较高，说明钩端螺旋体仍在猪中循环，山西已经成为以猪作为主要传染源的钩端螺旋体病经济疫源地。

Studies on inapparent infection of villagers and domestic animals in historic focus of leptospiro-sis were carried out at Gucheng village of Xiangfen county in Shanxi province, The results showed that inap-parent infection rate was 2.06%,8. 00%and 0 in healthy persons,pigs and oxen respectively。 Outbreaks offloodwater一type and rainwater一type of leptospirosis occured at Gucheng village in l976 and l979 and themain reservoir of those outbreaks was pigs。 After the outbreaks no apparent infection have occured in the vil-lagers at Gucheng village during l5 years while the infection rate in the pigs remains higher, It suggests thatthe leptospira has been circulating in pigs and Shanxi province has become a economic focus of leptospirosiswith pigs as the main source of infection.