Abstract:

Abstract:Objective To analyze the epidemiological features of hemorrhagic fever with renal syndrome（HFRS）in Inner Mongolia from  2001 to 2010,where  vaccination-based control strategies were carried out,and to provide a scientific basis for prevention and control of HFRS in the future.Methods The monitoring data of HFRS in Inner Mongolia from 2001 to 2010 was statristically analyzed with Excel software.Results A total of 2 640 HFRS cases and 35 deaths reported in Inner Mongolia with case fatality rate  1.33%,the average annual incidence was 1.10/100 000 from 2001 to 2010.The incidence numbers declined by 34%.The epidemics areas of HFRS had expanded,but there was general sporadic distribution,the HFRS cases mainly concentrated in the Hulunbeier City and Bayannaoer City.The most infections concentrated in the autumn-winter season,the peak was still in November.The cases mainly distributed in the young and adult.The incidence reported in males was more than that in the females at all groups.Farmer had the highest incidence in all occupations.The incidence of the HFRS began to show descending trend year by year,the annual incidence of the HFRS basically  maintained at the low level of less then 1/100 000 after 2007,after three years of implementing expanded program on immunization (EPI),the incidence numbers declined by 543,the average annual incidence declined to 0.43/100 000 from 1.19/100 000,compared with last three years.Conclusion Implement vaccination-based control strategies  had been performed since  2001,and the incidence and mortality of HFRS have greatly decreased in Inner Mongolia.

Key words: Inner Mongolia;hemorrhagic fever with renal syndrome;epidemiology;vaccination, surveillance