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唐河县位于南阳盆地东部，1990年该县的疟疾发病率已连续三年保持在fry以下，并经省卫生厅考核，确认达到了卫生部规定的基本消灭疟疾的标准。但是，1995年以来，该县南部沿桐柏山区的马振扶和权仪两个乡的部分村庄出现疟疾发病回升，个别村还出现了暴发流行。为了查清该?..
Tanghe County is located in the eastern part of Nanyang Basin. In 1990, the incidence of malaria in this county remained below fry for three consecutive years. It was confirmed by the provincial Department of Health that the basic malaria elimination standard stipulated by the Ministry of Health was reached. However, since 1995, the incidence of malaria has risen in some villages in Mazhenfurong and Quanyi in the Tongbai Mountain area in the southern part of the county, and an outbreak has been reported in several villages. In order to find out the?