Spatial-temporal distribution characteristics of hemorrhagic fever with renal syndrome in Gansu province, 2015−2020

  Objective   To analyze the epidemiological and spatial-temporal distribution characteristics of hemorrhagic fever with renal syndrome（HFRS） in Gansu from 2015 to 2020, and to provide evidence for the prevention and control of the disease.

  Methods   A database of the diseases in Gansu from 2015 to 2020 was established by using geographical information system. ArcGIS 10.5 and SaTScan 9.6 were used for the trend surface analysis and space-time scanning analysis of HFRS.

  Results   663 cases of HFRS were reported, and 1 patient died from 2015 to 2020. The annual incidence rate was 0.42 per 100000. The cases were mainly distributed in age group 40–60, and the male to female ratio was 1.64∶1. Most cases were farmers and herdsmen. Spring-summer and autumn-winter were the incidence peak seasons. The trend surface analysis showed that the incidence of HFRS decreased gradually from south to north in Gansu, and an obvious inverted U type curve could reflect the distribution from east to west. Space-time clustering showed that there existed spatial and space-time cluster of the diseases in Gansu from 2018 to 2020. The gathering areas were located in 11 counties (cities) in the southern region and south of central part of Gansu Province.

  Conclusion   The incidence of HFRS had obviously spatial clustering characteristic. Spring-summer and autumn-winter were the incidence peak seasons. Young and middle-aged farmers and herdsmen appeared the main risk groups. The high-high cluster of HFRS in the southern region and south of central part of Gansu province, and there was a trend of diffusion. Monitoring in key areas should be strengthened, and targeted prevention and control measures should be carried out.