Surveillance on schistosomiasis in five provinces of the People's Republic of China in post-elimination era

Abstract Background: The People’s Republic of China (P. R. China) had made significant progress on schistosomiasis control. Among the 12 provinces (municipality, autonomous region with schistosomiasis endemic) in P.R. China, Guangdong, Shanghai, Fujian, Guangxi and Zhejiang provinces (following called as five provinces) had successively eliminated schistosomiasis during 1985-1995. However, given the increasing mobilization of the population and goods, wetland protection, climate changes etc., consolidation of the schistosomiasis elimination in these five provinces remain challenges. In the current study, we sought to understand the epidemic situation in these post-elimination areas and their surveillance capabilities on schistosomiasis. Methods: (Ⅰ) Through the national schistosomiasis reporting system, annual data reflecting the interventions and surveillance on human beings, cattle and snails based on county level from 2005 to 2016 were collected and analyzed to understand the epidemic status of schistosomiasis in five provinces. (Ⅱ) A standardized score sheet was designed to assess the surveillance capacity for schistosomiasis of selected disease control agencies in five provinces and ten counties. Assessment on surveillance capacity consisted of two parts: the first part focused on the capacity of testing skills including schistosomiasis diagnostic skills, identification of snails’ living and infection status; the second part was to assess the knowledge level about schistosomiasis and its control.Results: The comprehensive assessments showed that no local cases in humans and cattle or infected snail were found in these five provinces from 2005, and the surveillance abilities on schistosomiasis of the prevention and control institutions in five provinces were appropriate. However, from 2005 to 2016, a total of 221 imported cases were detected in Zhejiang, Shanghai and Fujian provinces, and 11.98 hm2 of new snail habitats were found in Zhejiang, Shanghai and Guangxi provinces. In addition, snail infestation was reoccurred in 247.55 hm2 of former snail habitats since 2011.Conclusions: Elimination of schistosomiasis was consolidated successfully in five provinces of P.R. China due to effective and strong post-elimination surveillance. Comprehensive consolidation strategies should be focused on the elimination of residual snails and the prevention of imported infection sources among the five provinces to consolidate the achievements of schistosomiasis control.

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Surveillance on schistosomiasis in five provinces of the People’s Republic of China in the post-elimination era

10.21203/rs.3.rs-44180/v2 ◽

2020 ◽

Author(s):

Jing-yi Guo ◽

Jing Xu ◽

Lijuan Zhang ◽

Lv Shan ◽

Chun-li Cao ◽

...

Keyword(s):

Infected Snail ◽

People’S Republic Of China ◽

Annual Data ◽

Wetland Protection ◽

Human Beings ◽

People's Republic Of China ◽

Schistosomiasis Control ◽

Republic Of China ◽

Imported Infection ◽

Imported Cases

Abstract Background: The People’s Republic of China (P. R. China) has made significant progress on schistosomiasis control. Among the 12 provinces (municipality, autonomous region) with schistosomiasis endemic in P.R. China, Guangdong, Shanghai, Fujian, Guangxi and Zhejiang provinces (following called as five provinces) had successively eliminated schistosomiasis during 1985-1995. However, given the increasing mobilization of the population and goods, wetland protection, climate changes etc., consolidation of the schistosomiasis elimination in these five provinces remains challenging. In the current study, we sought to understand the epidemic situation in these post-elimination areas and their surveillance capabilities on schistosomiasis. Methods: (Ⅰ) Through the national schistosomiasis reporting system, annual data reflecting the interventions and surveillance on human beings, cattle and snails based on county level from 2005 to 2016 were collected and analyzed to understand the epidemic status of schistosomiasis in five provinces. (Ⅱ) A standardized score sheet was designed to assess the surveillance capacity for schistosomiasis of selected disease control agencies in five provinces and ten counties. Assessment on surveillance capacity consisted of two parts: the first part focused on the capacity of testing skills including schistosomiasis diagnostic skills, identification of snails’ living and infection status; the second part was to assess the knowledge level about schistosomiasis and its control.Results: The comprehensive assessments showed that no local cases in humans and cattle or infected snail were found in these five provinces from 2005, and the surveillance abilities on schistosomiasis of the prevention and control institutions in five provinces were appropriate. However, from 2005 to 2016, a total of 221 imported cases were detected in Zhejiang, Shanghai and Fujian provinces, and 11.98 hm2 of new snail habitats were found in Zhejiang, Shanghai and Guangxi provinces. In addition, snail infestation reoccurred in 247.55 hm2 of former snail habitats since 2011.Conclusions: Elimination of schistosomiasis was consolidated successfully in five provinces of P.R. China due to effective and strong post-elimination surveillance. Comprehensive consolidation strategies should be focused on the elimination of residual snails and the prevention of imported infection sources among the five provinces to consolidate the achievements of schistosomiasis control.

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Surveillance on schistosomiasis in five provincial-level administrative divisions of the People’s Republic of China in the post-elimination era

Infectious Diseases of Poverty ◽

10.1186/s40249-020-00758-4 ◽

2020 ◽

Vol 9 (1) ◽

Author(s):

Jing-Yi Guo ◽

Jing Xu ◽

Li-Juan Zhang ◽

Shan Lv ◽

Chun-Li Cao ◽

...

Keyword(s):

Infected Snail ◽

People’S Republic Of China ◽

Annual Data ◽

Infection Status ◽

Human Beings ◽

People's Republic Of China ◽

Accuracy Rate ◽

Schistosomiasis Control ◽

Republic Of China ◽

Provincial Level

Abstract Background The People’s Republic of China (P. R. China) has made significant progress on schistosomiasis control. Among the 12 provincial-level administrative divisions (PLADs) with schistosomiasis endemic in P. R. China, Guangdong, Shanghai, Fujian, Guangxi and Zhejiang PLADs (following as five PLADs) had successively eliminated schistosomiasis during 1985–1995. However, consolidation of the schistosomiasis elimination in these five PLADs remains challenging. In the current study, we sought to understand the epidemic situation in these post-elimination areas and their surveillance capabilities on schistosomiasis. Methods Annual data reflecting the interventions and surveillance on human beings, cattle and snails based on county level from 2005 to 2016 were collected through the national schistosomiasis reporting system and the data were analyzed to understand the epidemic status of schistosomiasis in the five PLADs. A standardized score sheet was designed to assess the surveillance capacity for schistosomiasis of selected disease control agencies in five PLADs and ten counties. Assessment on surveillance capacity including schistosomiasis diagnostic skills, identification of snails’ living and infection status and knowledge about schistosomiasis and its control were made. Descriptive analysis was used to analyze the epidemic status and evaluation results on surveillance capacities. Results The assessments showed that no local cases in humans and cattle or infected snail were found in these five PLADs since 2005. However, from 2005 to 2016, a total of 221 imported cases were detected in Zhejiang, Shanghai and Fujian, and 11.98 hm2 of new snail habitats were found in Zhejiang, Shanghai and Guangxi. In addition, snail infestation reoccurred in 247.55 hm2 of former snail habitats since 2011. For the surveillance capacity assessment, the accuracy rate of IHA and MHT were 100 and 89.3%, respectively. All participants could judge the living status of snails accurately and 98.1% on the infection status of snails. The accuracy rate of the questionnaire survey was 98.0%. Conclusions Elimination of schistosomiasis was consolidated successfully in five PLADs of P. R. China due to effective and strong post-elimination surveillance. Comprehensive consolidation strategies should be focused on the elimination of residual snails and the prevention of imported infection sources to consolidate the achievements of schistosomiasis control.

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Surveillance on schistosomiasis in five PLADs of the People’s Republic of China in the post-elimination era

10.21203/rs.3.rs-44180/v3 ◽

2020 ◽

Author(s):

Jing-Yi Guo ◽

Jing Xu ◽

Li-Juan Zhang ◽

Shan Lv ◽

Chun-Li Cao ◽

...

Keyword(s):

Infected Snail ◽

People’S Republic Of China ◽

Annual Data ◽

Infection Status ◽

Human Beings ◽

People's Republic Of China ◽

Accuracy Rate ◽

Schistosomiasis Control ◽

Republic Of China ◽

Average Accuracy

Abstract Background: The People’s Republic of China (P. R. China) has made significant progress on schistosomiasis control. Among the 12 provinces (municipality, autonomous region) with schistosomiasis endemic in P. R. China, Guangdong, Shanghai, Fujian, Guangxi and Zhejiang provincial-level administrative divisions (PLADs, following as five PLADs) had successively eliminated schistosomiasis during 1985–1995. However, consolidation of the schistosomiasis elimination in these five PLADs remains challenging. In the current study, we sought to understand the epidemic situation in these post-elimination areas and their surveillance capabilities on schistosomiasis. Methods: Annual data reflecting the interventions and surveillance on human beings, cattle and snails based on county level from 2005 to 2016 were collected through the national schistosomiasis reporting system and the data were analyzed to understand the epidemic status of schistosomiasis in the five PLADs. Ten counties were selected according to the endemic situation before elimination in the five PLADs. A standardized score sheet was designed to assess the surveillance capacity for schistosomiasis of selected disease control agencies in five PLADs and ten counties. Assessment on surveillance capacity including schistosomiasis diagnostic skills, identification of snails’ living and infection status and knowledge about schistosomiasis and its control were made. And the accuracy rate of the assessment was calculated. Results: The comprehensive assessments showed that no local cases in humans and cattle or infected snail were found in these five PLADs since 2005, and the surveillance abilities on schistosomiasis of the prevention and control institutions in five PLADs were appropriate. However, from 2005 to 2016, a total of 221 imported cases were detected in Zhejiang, Shanghai and Fujian PLADs, and 11.98 hm2 of new snail habitats were found in Zhejiang, Shanghai and Guangxi PLADs. In addition, snail infestation reoccurred in 247.55 hm2 of former snail habitats since 2011. For the surveillance capacity assessment on diagnosis skills, the accuracy rate of IHA was 100%, and the accuracy rate of MHT was 89.3%. For snail identification, the accuracy rate of identifying the snails’ living status was 100%, and the average accuracy rate of identifying infection status of snails was 98.1%. The average accuracy rate of the questionnaire survey was 98.0%.Conclusions: Elimination of schistosomiasis was consolidated successfully in five PLADs of P.R. China due to effective and strong post-elimination surveillance. Comprehensive consolidation strategies should be focused on the elimination of residual snails and the prevention of imported infection sources among the five PLADs to consolidate the achievements of schistosomiasis control.

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