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60～70年代河南省淮河流域曾发生数次钩体病流行，形式以雨水和洪水型为主，流行菌群主要是波摩那群和犬群。1993年以后该流域的信阳地区发生了稻田型钧体病暴发流行。特于1995年对传染源及流行菌群进行了调查，结果报告如下。材料与方法1传染源：在发病乡以鼠夹法捕鼠，鉴定鼠
In the 1960s and 1970s, several leptospirosis cases occurred in the Huaihe River Valley of Henan Province, mainly in the form of rain and floods. The main epidemic groups were the Pomona and the canine population. After 1993, an outbreak of rice-related disease broke out in the Xinyang area of the basin. In 1995, the sources of infection and endemic microflora were investigated. The results are reported as follows. Materials and methods 1 Source of infection: In the incidence of rural rats caught rat trap method to identify rats