Assessment of schistosomiasis transmission risk along the Yangtze River basin after the flood disaster in 2020
10.16250/j.32.1374.2020242
- VernacularTitle:2020 年长江流域洪涝灾害后血吸虫病传播风险分析
- Author:
Li-Juan ZHANG
1
,
2
,
3
,
4
,
5
;
Hong-Qing ZHU
1
,
2
,
3
,
4
,
5
;
Qiang WANG
1
,
2
,
3
,
4
,
5
;
Shan LÜ
1
,
2
,
3
,
4
,
5
;
Jing XU
1
,
2
,
3
,
4
,
5
;
Shi-Zhu LI
1
,
2
,
3
,
4
,
5
Author Information
1. National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention
2. WHO Collaborating Centre for Tropical Diseases
3. Chinese Center for Tropical Diseases Research
4. National Center for International Research on Tropical Diseases, Ministry of Science and Technology
5. Key Laboratory of Parasite and Vector Biology of National Health Commission, Shanghai 200025, China
- Publication Type:Journal Article
- Keywords:
Schistosomiasis;
Flood disaster;
Transmission Risk;
Yangtze River basin
- From:
Chinese Journal of Schistosomiasis Control
2020;32(5):464-468
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the impact of the flood disaster on schistosomiasis transmission along the Yangtze River basin in 2020, so as to provide insights into schistosomiasis prevention and control in flood-affected areas. Methods The data pertaining to the endemic situation of schistosomiasis were collected from 5 provinces of Hunan, Hubei, Jiangxi, Anhui and Jiangsu from 2013 to 2019, including Schistosoma japonicum infections in humans and livestock and snail distribution, and the warning water levels and actual water status were collected in water regions locating in these 5 provinces. The cumulative numbers of S. japonicum egg-positive individuals and bovines during the period from 2013 to 2019, the area of snail habitats in 2019 and the water level on July 12, 2020 were estimated at a county level and employed as parameters for classification of schistosomiasis transmission risk. Then, the cumulative value of each risk index was calculated to assess the risk of schistosomiasis transmission risk. Results After the flood disaster along the Yangtze River basin in 2020, there were 10, 5 and 9 counties (districts) at high risk of schistosomiasis transmission in 5 provinces of Hunan, Hubei, Jiangxi, Anhui and Jiangsu based on number of egg-positive individuals, number of egg-positive bovines and snail distribution, respectively. Based on comprehensive risk indices, there were 10 (8 in Dongting Lake regions of Hunan Province and 2 in Poyang Lake regions of Jiangxi Province) and 15 counties (districts) (4 in Hubei Province, 7 in Hunan Province and 4 in Jiangxi Province) identified at grades 5 and 4 risk of schistosomiasis transmission. Conclusions Dongting Lake regions and Poyang Lake regions are the most severely flood-affected schistosomiasis-endemic foci of China in 2020, and the flood disaster may facilitate the transmission of schistosomiasis in affected areas. Therefore, schistosomiasis control requires to be intensified after the flood disaster to prevent the rebound of the disease.
