[Spatial and Temporal Distribution of Newly Diagnosed Echinococcosis Patients in Sichuan Province from 2007 to 2017]

Objective: To explore the spatial and temporal distribution characteristics of cases with newly diagnosed echinococcosis in Sichuan Province from 2007 to 2017, so as to provide reference for the formulation of echinococcosis prevention and control strategies and for the identification of key areas.

Methods: The spatial distribution maps of detection of cases with newly diagnosed echinococcosis were plotted in Sichuan Province from 2007 to 2017, and the spatial distribution characteristics and epidemic trends were analyzed.

Results: From 2007 to 2017, the detection rate of cases with newly diagnosed echinococcosis appeared a decline in Sichuan Province year by year, and the areas with a high detection rate of cases with newly diagnosed echinococcosis were mainly located in western, northwestern and northern parts of Sichuan Province, while the areas with a low detection rate were predominantly found in the southern and eastern parts of the province. The global Moran's values were 0.19, 0.22, 0.17, 0.44, 0.48, 0.31 and 0.16 for the detection rate of cases with newly diagnosed echinococcosis in Sichuan Province from 2010 to 2016 (all scores > 1.96, all values < 0.05), suggesting spatial aggregation distribution during this period. Local spatial autocorrelation analysis revealed that the"high-high"areas and"low-low"areas for the detection rate of cases with newly diagnosed echinococcosis all showed an aggregation tendency.

Conclusions: The detection rate of cases with newly diagnosed echinococcosis decreases in Sichuan Province from 2007 to 2017 year by year, and shows a spatial aggregation. The echinococcosis control activities should be intensified in Shiqu, Seda, Dege, Ganzi and Baiyu counties.