Objective To explore the relationship between the incidence of scrub typhus and land use in Pinggu district, Beijing, China. Methods The multi-scale segmentation and random forest algorithm in eCognition v9.0.1 software were performed to extract and classify the remote sensing image data of five townships (Wangxinzhuang town, Daxingzhuang town, Jinhaihu town, Nandulehe town, and Shandongzhuang town) in Pinggu district in 2016, 2018, and 2021 that had relatively large numbers of cases of scrub typhus. ArcGIS 10.7 software was used to calculate the area of each type of land in each township in each year. The relationship between the area of objects and the incidence of scrub typhus was analyzed through line graphs and Spearman's rank correlation analysis. Results The overall classification accuracy of remote sensing images of 5 towns in Pinggu district of Beijing in 3 years were all >80%, and the Kappa coefficients were between 0.600 and 0.800. The Spearman's rank correlation analysis showed that in the five townships, the incidence of scrub typhus was positively correlated with the ratio of green space area to non-forest land area from 2016 to 2018 (r=0.576, P=0.082), while there was no correlation between the incidence of scrub typhus and the proportion of object area from 2018 to 2021. From the perspectives of townships, in Nandulehe and Shandongzhuang towns, the incidence of scrub typhus was negatively correlated with bare soil/non-forest land ratio (all r=-1.000, all P<0.010), positively correlated with green space/non-forest land ratio (r=1.000, P<0.010), and negatively correlated with wasteland/non-forest land ratio (r=-1.000, P<0.010). However, there was a positive correlation between the incidence of scrub typhus and wasteland/non-forest land ratio in Jinhaihu town (r=1.000, P<0.010). The incidence of scrub typhus in the five townships was negatively correlated with building/non-forest land ratio in 2016 (r=-0.900, P=0.037), negatively correlated with water/non-forest land ratio in 2018 (r=-0.900, P=0.037), and positively correlated with water/non-forest land ratio in 2021 (r=0.900, P=0.037). Conclusion The incidence of scrub typhus in Pinggu district of Beijing was positively correlated with green space/non-forest land area ratio in 2016 and in 2018, but with no correlation between the two factors in 2018 and in 2021. The correlation results varied in different towns and different years.
ZHAO Jia-xin, LI Wen, LI Gui-chang, YUE Yu-juan, LIU Qi-yong, LU Liang
. Correlation between scrub typhus incidence and land use in Pinggu district, Beijing, China[J]. Chinese Journal of Vector Biology and Control, 2022
, 33(3)
: 371
-378
.
DOI: 10.11853/j.issn.1003.8280.2022.03.011
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