Epidemiological characteristics of hemorrhagic fever with renal syndrome in Xi'an from 2009 to 2018 / 中华地方病学杂志

ABSTRACT

Objective:To analyze the epidemiological characteristics and tendency of hemorrhagic fever with renal syndrome (HFRS) in Xi'an, master its popular and development laws, and provide scientific basis for formulating targeted prevention and control measures.Methods:The retrospective method was used to collect HFRS epidemic data and demographic data from 2009 to 2018 in Xi'an. The descriptive epidemiological method was used to analyze the three distributions (time, region, population distributions) of HFRS.Results:There were 8 710 HFRS cases in Xi'an from 2009 to 2018, with an average annual incidence of 10.13/100 000 and an average annual mortality rate of 0.08/100 000; the incidence of HFRS had decreased year by year since the peak incidence in 2010 (19.46/100 000), and had rebounded in 2017 (9.14/100 000), 2018 (9.04/100 000). The time distribution of the onset of HFRS was bimonthly, with peak in autumn and winter (October to January of following year) each year, accounting for 74.08% (6 452/8 710) of the total number of cases; the peak in spring and summer (May to July) accounted for 14.33% (1 248/8 710). HFRS cases were mainly concentrated in Chang'an District (2 446 cases), Zhouzhi County (1 494 cases), Hu County (1 170 cases), and Lintong District (940 cases), accounting for 69.46% (6 050/8 710). The age of onset of HFRS cases was mainly concentrated in 15-59 years old, accounting for 74.06% (6 451/8 710); the incidence rate in males was 14.77/100 000, in females was 5.25/100 000, the difference was statistically significant between gender (χ 2=1 921.42, P < 0.05); the occupational distribution was mainly farmers, accounting for 68.38% (5 956/8 710). Conclusions:From 2009 to 2016, the HFRS epidemic situation in Xi'an has showed a downward trend, and the incidence of HFRS has rebounded in 2017-2018. Xi'an should continue to take active and effective comprehensive measures to intervene to further realize effective control of HFRS.