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Koray MH. Ghana's path towards eliminating lymphatic filariasis. Trop Med Health 2024; 52:37. [PMID: 38734648 PMCID: PMC11088759 DOI: 10.1186/s41182-024-00596-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Accepted: 03/31/2024] [Indexed: 05/13/2024] Open
Abstract
Lymphatic filariasis, also known as elephantiasis, is a debilitating parasitic disease that has been prevalent in various parts of the world, including China and Ghana. This paper explores the historical context of lymphatic filariasis in Ghana and China, as well as the fights towards eliminating the disease in both countries. The review also covered the strategies employed by the Chinese government to eliminate lymphatic filariasis and the key lessons that Ghana can learn from China's success. The discussion highlights the importance of political commitment, multisectoral collaboration, tailoring control strategies to local contexts, adopting a comprehensive approach, and emphasising health education and community mobilisation. By adopting these lessons and fostering a robust national strategy, engaging diverse stakeholders, and ensuring active community involvement, Ghana can work towards achieving lymphatic filariasis elimination, improving public health, and fostering sustainable development.
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Chen H, Huang S, Zhao Y, Sun R, Wang J, Yao S, Huang J, Yu Z. Metagenomic analysis of the intestinal microbiome reveals the potential mechanism involved in Bacillus amyloliquefaciens in treating schistosomiasis japonica in mice. Microbiol Spectr 2024; 12:e0373523. [PMID: 38441977 PMCID: PMC10986500 DOI: 10.1128/spectrum.03735-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Accepted: 02/11/2024] [Indexed: 03/07/2024] Open
Abstract
Schistosomiasis japonica is one of the neglected tropical diseases characterized by chronic hepatic, intestinal granulomatous inflammation and fibrosis, as well as dysbiosis of intestinal microbiome. Previously, the probiotic Bacillus amyloliquefaciens has been shown to alleviate the pathological injuries in mice infected with Schistosoma japonicum by improving the disturbance of the intestinal microbiota. However, the underlying mechanisms involved in this process remain unclear. In this study, metagenomics sequencing and functional analysis were employed to investigate the differential changes in taxonomic composition and functional genes of the intestinal microbiome in S. japonicum-infected mice treated with B. amyloliquefaciens. The results revealed that intervention with B. amyloliquefaciens altered the taxonomic composition of the intestinal microbiota at the species level in infected mice and significantly increased the abundance of beneficial bacteria. Moreover, the abundance of predicted genes in the intestinal microbiome was also significantly changed, and the abundance of xfp/xpk and genes translated to urease was significantly restored. Further analysis showed that Limosilactobacillus reuteri was positively correlated with several KEGG Orthology (KO) genes and metabolic reactions, which might play important roles in alleviating the pathological symptoms caused by S. japonicum infection, indicating that it has the potential to function as another effective therapeutic agent for schistosomiasis. These data suggested that treatment of murine schistosomiasis japonica by B. amyloliquefaciens might be induced by alterations in the taxonomic composition and functional gene of the intestinal microbiome in mice. We hope this study will provide adjuvant strategies and methods for the early prevention and treatment of schistosomiasis japonica. IMPORTANCE Targeted interventions of probiotics on gut microbiome were used to explore the mechanism of alleviating schistosomiasis japonica. Through metagenomic analysis, there were significant changes in the composition of gut microbiota in mice infected with Schistosoma japonicum and significant increase in the abundance of beneficial bacteria after the intervention of Bacillus amyloliquefaciens. At the same time, the abundance of functional genes was found to change significantly. The abundance of genes related to urease metabolism and xfp/xpk related to D-erythrose 4-phosphate production was significantly restored, highlighting the importance of Limosilactobacillus reuteri in the recovery and abundance of predicted genes of the gut microbiome. These results indicated potential regulatory mechanism between the gene function of gut microbiome and host immune response. Our research lays the foundation for elucidating the regulatory mechanism of probiotic intervention in alleviating schistosomiasis japonica, and provides potential adjuvant treatment strategies for early prevention and treatment of schistosomiasis japonica.
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Affiliation(s)
- Hao Chen
- Department of Parasitology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
- Human Microbiome and Health Group, Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Shuaiqin Huang
- Department of Parasitology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Yiming Zhao
- Human Microbiome and Health Group, Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Ruizheng Sun
- Department of General Surgery, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jingyan Wang
- Human Microbiome and Health Group, Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Siqi Yao
- Human Microbiome and Health Group, Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Jing Huang
- Department of Parasitology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
- Human Microbiome and Health Group, Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
| | - Zheng Yu
- Human Microbiome and Health Group, Department of Microbiology, School of Basic Medical Science, Central South University, Changsha, Hunan, China
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Xu Y, Wang Y, Wang L, Kong X, Yan G, Li Y, Bu C, Zhang B. The prevalence of soil transmitted helminths and its influential factors in Shandong Province, China: an analysis of surveillance data from 2016 to 2020. Infect Dis Poverty 2023; 12:54. [PMID: 37217956 DOI: 10.1186/s40249-023-01100-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2022] [Accepted: 05/04/2023] [Indexed: 05/24/2023] Open
Abstract
BACKGROUND Soil-transmitted helminths (STHs) were previously endemic in Shandong Province, China. This study aimed to analyze the STHs prevalence trend and the natural, social, and human cognitive and behavioural factors influencing the discrepancies between high and low infection levels from 2016 to 2020 in Shandong Province in eastern China. METHODS STHs surveillance data of Shandong Province from 2016 to 2020 were obtained from China Information Management System for Prevention and Control of Parasitic Diseases. STHs infections were detected by modified Kato-Katz method. Comprehensive information on the natural and social factors, STHs-related knowledge and behaviours were collected through questionnaire surveys. Retrospective spatial scan analysis was performed using SaTScan v10.1 to evaluate any identified spatial clusters of STHs infection for statistical significance and Bayes discriminant analysis was used to discriminate the high or low infection groups of the villages. RESULTS In total, 72,160 participants were involved in our survey from 2016 to 2020. The overall STHs prevalence rate was 1.13%, with the eastern region of Shandong Province having the highest rate (2.02%). The predominant species was T. trichiura, with the prevalence rate of 0.99% and the ≥ 70-year age group possessed the highest rate of 2.21%. The STHs prevalence rate showed an annual linear downward trend from 2016 to 2020 ([Formula: see text] = 127.600, P < 0.001). Respondents aged ≥ 60 years had the lowest awareness level of STHs-related prevention knowledge (all P < 0.05), and were the most likely to adopt the practice of fertilizing with fresh stool (χ2 = 28.354, P < 0.001). Furthermore, the southern region demonstrated the highest temperature and rainfall level and the lowest GNP and annual net income per capita (all P < 0.05). CONCLUSIONS There is a remarkable declining in STHs prevalence in Shandong Province from 2016 to 2020. However, the prevalence rates of STHs especially T. trichiura in the southern and eastern regions were still high, and the elderly were more susceptible to be infected with STHs owning to their low awareness level of STHS-related prevention knowledge and high adoption rate of dangerous production and living behaviours. Integrated approaches of health education, environment improvement and behaviour change should be strengthened to obtain a further reduction of STHs prevalence in China.
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Affiliation(s)
- Yan Xu
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, No.11 Taibai Middle Road, Rencheng District, Jining City, 272033, Shandong Province, People's Republic of China
| | - Yongbin Wang
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, No.11 Taibai Middle Road, Rencheng District, Jining City, 272033, Shandong Province, People's Republic of China
| | - Longjiang Wang
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, No.11 Taibai Middle Road, Rencheng District, Jining City, 272033, Shandong Province, People's Republic of China
| | - Xiangli Kong
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, No.11 Taibai Middle Road, Rencheng District, Jining City, 272033, Shandong Province, People's Republic of China
| | - Ge Yan
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, No.11 Taibai Middle Road, Rencheng District, Jining City, 272033, Shandong Province, People's Republic of China
| | - Yuejin Li
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, No.11 Taibai Middle Road, Rencheng District, Jining City, 272033, Shandong Province, People's Republic of China
| | - Cancan Bu
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, No.11 Taibai Middle Road, Rencheng District, Jining City, 272033, Shandong Province, People's Republic of China
| | - Benguang Zhang
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, No.11 Taibai Middle Road, Rencheng District, Jining City, 272033, Shandong Province, People's Republic of China.
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Li Y, Guo S, Dang H, Zhang L, Xu J, Li S. Oncomelania hupensis Distribution and Schistosomiasis Transmission Risk in Different Environments under Field Conditions. Trop Med Infect Dis 2023; 8:tropicalmed8050242. [PMID: 37235290 DOI: 10.3390/tropicalmed8050242] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 04/15/2023] [Accepted: 04/16/2023] [Indexed: 05/28/2023] Open
Abstract
The goal of schistosomiasis prevention and control in China is shifting from transmission interruption to elimination. However, the area inhabited by the intermediate host, the snail Oncomelania hupensis, has not changed much in recent years. Different environmental types have different impacts on snail breeding, and understanding these differences is conducive to improving the efficiency of snail monitoring and control and to saving resources. Based on previous epidemiological data, we selected 199 villages in 2020 and 269 villages in 2021 from transmission control, transmission interruption, and elimination areas of snail breeding. Snail surveys were conducted in selected villages using systematic sampling and/or environmental sampling methods in six types of snail-breeding environments (canals, ponds, paddy fields, dry lands, bottomlands, and undefined environments). All live snails collected from the field were evaluated for Schistosoma japonicum infection using the microscopic dissection method, and a subsample of snails was subjected to loop-mediated isothermal amplification (LAMP) to assess the presence of S. japonicum infection. Snail distribution data and infection rate and nucleic acid positive rate of schistosomes in snails were calculated and analyzed. The 2-year survey covered 29,493 ha of the environment, in which 12,313 ha of snail habitats were detected. In total, 51.16 ha of new snail habitats and 107.76 ha of re-emergent snail habitats were identified during the survey. The occurrence rate of snails in canals (10.04%, 95% CI: 9.88-10.20%) and undefined environments (20.66%, 95% CI: 19.64-21.67%) was relatively high in 2020, and the density of snails in bottomlands (0.39, 95% CI: 0.28-0.50) and undefined environments (0.43, 95% CI: 0.14-1.60) was relatively high in 2021. Of the 227,355 live snails collected in this study, none were S. japonicum-positive as determined by microscopy. Of the 20,131 pooled samples, however, 5 were S. japonicum-positive based on LAMP analysis, and they were distributed in three environmental types: 3 in bottomland, 1 in dry land, and 1 in a canal. The bottomland environment has a high risk of schistosomiasis transmission because it contains a large area of newly emerging and re-emerging snail habitats, and it also had the most breeding snails infected with S. japonicum. Thus, this habitat type should be the key target for snail monitoring and early warning and for the prevention and control of schistosomiasis.
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Affiliation(s)
- Yinlong Li
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Disease Research), NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Center for Tropical Disease, National Center for International Research on Tropical Disease, Shanghai 200025, China
| | - Suying Guo
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Disease Research), NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Center for Tropical Disease, National Center for International Research on Tropical Disease, Shanghai 200025, China
| | - Hui Dang
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Disease Research), NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Center for Tropical Disease, National Center for International Research on Tropical Disease, Shanghai 200025, China
| | - Lijuan Zhang
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Disease Research), NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Center for Tropical Disease, National Center for International Research on Tropical Disease, Shanghai 200025, China
| | - Jing Xu
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Disease Research), NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Center for Tropical Disease, National Center for International Research on Tropical Disease, Shanghai 200025, China
| | - Shizhu Li
- National Institute of Parasitic Disease, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Disease Research), NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Center for Tropical Disease, National Center for International Research on Tropical Disease, Shanghai 200025, China
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Zheng Y, Shi Y, Li S, Deng W, Zhou J, Hu B, Jiang H, Zhang N, Wang Z, Xiong Y, Chen Y, Jiang Q, Zhou Y. Environmental Determinants for Snail Density in Dongting Lake Region: An Ecological Study Incorporating Spatial Regression. Am J Trop Med Hyg 2022; 107:1178-1184. [PMID: 36375461 PMCID: PMC9768266 DOI: 10.4269/ajtmh.22-0238] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 08/23/2022] [Indexed: 11/16/2022] Open
Abstract
This study explored the environmental determinants of different months on snail density measured in April at different types of snail habitats (marshlands, inner embankments, and hills) by considering spatial effects. Data were gathered from surveys on snails that were conducted in Hunan Province in April 2016, and information was collected on environmental variables. To investigate the environmental factors influencing snail density in various types of snail habitats, the ordinary least square model, spatial lag model, and spatial error model were all used. The environmental determinants for snail density showed different effects in the three types of snail habitats. In marshlands, snail density measured in April was associated positively with the normalized difference vegetation index (NDVI) and was associated negatively with flooding duration and annual hours of sunshine. Extreme temperatures correlated strongly to snail density measured in April (P < 0.05). In areas inside embankments, snail density measured in April increased with a decreased distance between snail habitat and the nearest river (P < 0.05). In hills, extreme heat, annual hours of sunshine, NDVI in September, and annual average land surface temperature (LST) were associated negatively with snail density measured in April, whereas index of moisture (IM) was associated positively with snail density measured in April (P < 0.05). The effects of LST and hours of sunshine on snail density measured in April varied with months of the year in the three different types of snail habitats (P < 0.05). Our study might provide a theoretical foundation for preventing snail transmission and subsequent spread of schistosomiasis.
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Affiliation(s)
- Yingyan Zheng
- Fudan University School of Public Health, Shanghai, China
- Department of Scientific Research, Children’s Hospital of Fudan University, National Children’s Medical Center, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai, China
- Fudan University Center for Tropical Disease Research, Shanghai, China
| | - Ying Shi
- Fudan University School of Public Health, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai, China
- Fudan University Center for Tropical Disease Research, Shanghai, China
- Tongren Hospital Affiliated to Shanghai Jiaotong University, Shanghai, China
| | - Shengming Li
- Hunan Institute for Schistosomiasis Control, Yueyang, China
| | - Weicheng Deng
- Hunan Institute for Schistosomiasis Control, Yueyang, China
| | - Jie Zhou
- Hunan Institute for Schistosomiasis Control, Yueyang, China
| | - Benjiao Hu
- Hunan Institute for Schistosomiasis Control, Yueyang, China
| | - Honglin Jiang
- Fudan University School of Public Health, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai, China
- Fudan University Center for Tropical Disease Research, Shanghai, China
| | - Na Zhang
- Fudan University School of Public Health, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai, China
- Fudan University Center for Tropical Disease Research, Shanghai, China
| | - Zhengzhong Wang
- Fudan University School of Public Health, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai, China
- Fudan University Center for Tropical Disease Research, Shanghai, China
| | - Ying Xiong
- Fudan University School of Public Health, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai, China
- Fudan University Center for Tropical Disease Research, Shanghai, China
| | - Yue Chen
- School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Qingwu Jiang
- Fudan University School of Public Health, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai, China
- Fudan University Center for Tropical Disease Research, Shanghai, China
| | - Yibiao Zhou
- Fudan University School of Public Health, Shanghai, China
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai, China
- Fudan University Center for Tropical Disease Research, Shanghai, China
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Alene KA, Gordon CA, Clements ACA, Williams GM, Gray DJ, Zhou XN, Li Y, Utzinger J, Kurscheid J, Forsyth S, Zhou J, Li Z, Li G, Lin D, Lou Z, Li S, Ge J, Xu J, Yu X, Hu F, Xie S, McManus DP. Spatial Analysis of Schistosomiasis in Hunan and Jiangxi Provinces in the People's Republic of China. Diseases 2022; 10:93. [PMID: 36278592 PMCID: PMC9590053 DOI: 10.3390/diseases10040093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 09/30/2022] [Accepted: 10/11/2022] [Indexed: 11/07/2023] Open
Abstract
Understanding the spatial distribution of schistosome infection is critical for tailoring preventive measures to control and eliminate schistosomiasis. This study used spatial analysis to determine risk factors that may impact Schistosoma japonicum infection and predict risk in Hunan and Jiangxi Provinces in the People's Republic of China. The study employed survey data collected in Hunan and Jiangxi in 2016. Independent variable data were obtained from publicly available sources. Bayesian-based geostatistics was used to build models with covariate fixed effects and spatial random effects to identify factors associated with the spatial distribution of infection. Prevalence of schistosomiasis was higher in Hunan (12.8%) than Jiangxi (2.6%). Spatial distribution of schistosomiasis varied at pixel level (0.1 × 0.1 km), and was significantly associated with distance to nearest waterbody (km, β = -1.158; 95% credible interval [CrI]: -2.104, -0.116) in Hunan and temperature (°C, β = -4.359; 95% CrI: -9.641, -0.055) in Jiangxi. The spatial distribution of schistosomiasis in Hunan and Jiangxi varied substantially and was significantly associated with distance to nearest waterbody. Prevalence of schistosomiasis decreased with increasing distance to nearest waterbody in Hunan, indicating that schistosomiasis control should target individuals in close proximity to open water sources as they are at highest risk of infection.
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Affiliation(s)
| | - Catherine A. Gordon
- Infection and Inflammation Program, QIMR Berghofer Medical Research Institute, Brisbane 4006, Australia
| | | | - Gail M. Williams
- School of Population Health, University of Queensland, Brisbane 4072, Australia
| | - Darren J. Gray
- Department of Global Health, Australian National University, Canberra 0200, Australia
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Yuesheng Li
- Infection and Inflammation Program, QIMR Berghofer Medical Research Institute, Brisbane 4006, Australia
- Hunan Institute of Schistosomiasis Control, Yueyang 414000, China
| | - Jürg Utzinger
- Swiss Tropical and Public Health Institute, CH-4051 Allschwil, Switzerland
- University of Basel, CH-4003 Basel, Switzerland
| | - Johanna Kurscheid
- School of Population Health, University of Queensland, Brisbane 4072, Australia
- Swiss Tropical and Public Health Institute, CH-4051 Allschwil, Switzerland
| | - Simon Forsyth
- School of Population Health, University of Queensland, Brisbane 4072, Australia
| | - Jie Zhou
- Hunan Institute of Schistosomiasis Control, Yueyang 414000, China
| | - Zhaojun Li
- Jiangxi Institute of Parasitic Diseases, Nanchang 330096, China
| | - Guangpin Li
- Hunan Institute of Schistosomiasis Control, Yueyang 414000, China
| | - Dandan Lin
- Jiangxi Institute of Parasitic Diseases, Nanchang 330096, China
| | - Zhihong Lou
- Hunan Institute of Schistosomiasis Control, Yueyang 414000, China
| | - Shengming Li
- Hunan Institute of Schistosomiasis Control, Yueyang 414000, China
| | - Jun Ge
- Jiangxi Institute of Parasitic Diseases, Nanchang 330096, China
| | - Jing Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, NHC Key Laboratory of Parasite and Vector Biology, WHO Collaborating Centre for Tropical Diseases, National Center for International Research on Tropical Diseases, Shanghai 200025, China
| | - Xinling Yu
- Hunan Institute of Schistosomiasis Control, Yueyang 414000, China
| | - Fei Hu
- Jiangxi Institute of Parasitic Diseases, Nanchang 330096, China
| | - Shuying Xie
- Jiangxi Institute of Parasitic Diseases, Nanchang 330096, China
| | - Donald P. McManus
- Infection and Inflammation Program, QIMR Berghofer Medical Research Institute, Brisbane 4006, Australia
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Fang Y, Wang J, He G, Zhang Q, Xiao J, Hu J, Rong Z, Yin L, Zeng F, Yang P, Dong X, Liu D, Liang X, Deng Z, Liu T, Ma W. Long-Term Trend Analysis of Major Human Helminth Infections - Guangdong Province, China, 1988-2021. China CDC Wkly 2022; 4:912-919. [PMID: 36426289 PMCID: PMC9681603 DOI: 10.46234/ccdcw2022.188] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2022] [Accepted: 10/09/2022] [Indexed: 06/16/2023] Open
Abstract
INTRODUCTION Although helminth infections threaten millions of people worldwide, the spatiotemporal characteristics remain unclear across China. This study systematically describes the spatiotemporal changes of major human helminth infections and their epidemiological characteristics from 1988 to 2021 in Guangdong Province, China. METHODS The survey data in Guangdong Province were primarily obtained from 3 national surveys implemented during 1988-1992, 2001-2004, and 2014-2016, respectively, and from the China Information System for Disease Control and Prevention during 2019-2021. A modified Kato-Katz technique was used to detect parasite eggs in collected fecal samples. RESULTS The overall standardized infection rates (SIRs) of any soil-transmitted helminths (STH) and Clonorchis sinensis decreased from 65.27% during 1988-1992 to 4.23% during 2019-2021. In particular, the SIRs of STH had even more of a decrease, from 64.41% during 1988-1992 to 0.31% during 2019-2021. The SIRs of Clonorchis sinensis in the 4 surveys were 2.40%, 12.17%, 5.20%, and 3.93%, respectively. This study observed different permutations of gender, age, occupation, and education level on the SIRs of helminths. CONCLUSIONS The infection rate of STH has substantially decreased. However, the infection rate of Clonorchis sinensis has had fewer changes, and it has become the dominant helminth.
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Affiliation(s)
- Yueyi Fang
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou City, Guangdong Province, China
| | - Jiong Wang
- School of Public Health, Southern Medical University, Guangzhou City, Guangdong Province, China
| | - Guanhao He
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou City, Guangdong Province, China
- Disease Control and Prevention Institute of Jinan University, Jinan University, Guangzhou City, Guangdong Province, China
| | - Qiming Zhang
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou City, Guangdong Province, China
| | - Jianpeng Xiao
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou City, Guangdong Province, China
| | - Jianxiong Hu
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou City, Guangdong Province, China
| | - Zuhua Rong
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou City, Guangdong Province, China
| | - Lihua Yin
- Guangdong Provincial Institute of Public Health, Guangdong Provincial Center for Disease Control and Prevention, Guangzhou City, Guangdong Province, China
| | - Fangfang Zeng
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou City, Guangdong Province, China
- Disease Control and Prevention Institute of Jinan University, Jinan University, Guangzhou City, Guangdong Province, China
| | - Pan Yang
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou City, Guangdong Province, China
- Disease Control and Prevention Institute of Jinan University, Jinan University, Guangzhou City, Guangdong Province, China
| | - Xiaomei Dong
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou City, Guangdong Province, China
- Disease Control and Prevention Institute of Jinan University, Jinan University, Guangzhou City, Guangdong Province, China
| | - Dan Liu
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou City, Guangdong Province, China
- Disease Control and Prevention Institute of Jinan University, Jinan University, Guangzhou City, Guangdong Province, China
| | - Xiaofeng Liang
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou City, Guangdong Province, China
- Disease Control and Prevention Institute of Jinan University, Jinan University, Guangzhou City, Guangdong Province, China
| | - Zhuohui Deng
- Guangdong Provincial Center for Disease Control and Prevention, Guangzhou City, Guangdong Province, China
| | - Tao Liu
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou City, Guangdong Province, China
- Disease Control and Prevention Institute of Jinan University, Jinan University, Guangzhou City, Guangdong Province, China
| | - Wenjun Ma
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou City, Guangdong Province, China
- Disease Control and Prevention Institute of Jinan University, Jinan University, Guangzhou City, Guangdong Province, China
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Li YL, Dang H, Guo SY, Zhang LJ, Feng Y, Ding SJ, Shan XW, Li GP, Yuan M, Xu J, Li SZ. Molecular evidence on the presence of Schistosoma japonicum infection in snails along the Yangtze River, 2015-2019. Infect Dis Poverty 2022; 11:70. [PMID: 35717331 PMCID: PMC9206329 DOI: 10.1186/s40249-022-00995-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2022] [Accepted: 06/05/2022] [Indexed: 12/12/2022] Open
Abstract
Background Due to sustained control activities, the prevalence of Schistosoma japonicum infection in humans, livestock and snails has decreased significantly in P. R. China, and the target has shifted from control to elimination according to the Outline of Healthy China 2030 Plan. Applying highly sensitive methods to explore the presence of S. japonicum infection in its intermediate host will benefit to assess the endemicity or verify the transmission interruption of schistosomiasis accurately. The aim of this study was to access the presence of S. japonicum infection by a loop-mediated isothermal amplification (LAMP) method through a 5-year longitudinal study in five lake provinces along the Yangtze River. Methods Based on previous epidemiological data, about 260 villages with potential transmission risk of schistosomiasis were selected from endemic counties in five lake provinces along the Yangtze River annually from 2015 to 2019. Snail surveys were conducted in selected villages by systematic sampling method and/or environmental sampling method each year. All live snails collected from field were detected by microscopic dissection method, and then about one third of them were detected by LAMP method to assess the presence of S. japonicum infection with a single blind manner. The infection rate and nucleic acid positive rate of schistosomes in snails, as well as the indicators reflecting the snails’ distribution were calculated and analyzed. Fisher's exact test was used to examine any change of positive rate of schistosomes in snails over time. Results The 5-year survey covered 94,241 ha of environment with 33,897 ha of snail habitats detected accumulatively. Totally 145.3 ha new snail habitats and 524.4 ha re-emergent snail habitats were found during 2015–2019. The percentage of frames with snails decreased from 5.93% [45,152/761,492, 95% confidence intervals (CI): 5.88–5.98%] in 2015 to 5.25% (30,947/589,583, 95% CI: 5.19–5.31%) in 2019, while the mean density of living snails fluctuated but presented a downward trend generally from 0.20 snails/frame (155,622/761,492, 95% CI: 0.17–0.37) in 2015 to 0.13 snails/frame (76,144/589,583, 95% CI: 0.11–0.39) in 2019. A total of 555,393 live snails were collected, none of them was positive by dissection method. Totally 17 pooling snail samples were determined as positives by LAMP method among 8716 pooling samples with 174,822 of living snails, distributed in 12 villages of Hubei, Hunan, Jiangxi and Anhui provinces. The annual average positive rate was 0.41% (95% CI: 0.13–0.69%) in 2015, 0% in 2016, 0.36% (95% CI: 0.09–0.63%) in 2017, 0.05% (95% CI: 0–0.16%) in 2018, 0.05% (95% CI: 0–0.15%) in 2019, respectively, presenting a downward trend from 2015 to 2019 with statistical significance (χ2 = 11.64, P < 0.05). Conclusions The results suggest that S. japonicum infection still persisted in nature along the Yangtze River and traditional techniques might underestimate the prevalence of schistosomiasis in its intermediate hosts. Exploring and integrating molecular techniques into national surveillance programme could improve the sensitivity of surveillance system and provide guidance on taking actions against schistosomiasis. Graphical Abstract ![]()
Supplementary Information The online version contains supplementary material available at 10.1186/s40249-022-00995-9.
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Affiliation(s)
- Yin-Long Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), Shanghai, 200025, People's Republic of China.,NHC Key Laboratory of Parasite and Vector Biology, Shanghai, 200025, People's Republic of China.,WHO Collaborating Centre for Tropical Diseases, Shanghai, 200025, People's Republic of China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, People's Republic of China
| | - Hui Dang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), Shanghai, 200025, People's Republic of China.,NHC Key Laboratory of Parasite and Vector Biology, Shanghai, 200025, People's Republic of China.,WHO Collaborating Centre for Tropical Diseases, Shanghai, 200025, People's Republic of China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, People's Republic of China
| | - Su-Ying Guo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), Shanghai, 200025, People's Republic of China.,NHC Key Laboratory of Parasite and Vector Biology, Shanghai, 200025, People's Republic of China.,WHO Collaborating Centre for Tropical Diseases, Shanghai, 200025, People's Republic of China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, People's Republic of China
| | - Li-Juan Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), Shanghai, 200025, People's Republic of China.,NHC Key Laboratory of Parasite and Vector Biology, Shanghai, 200025, People's Republic of China.,WHO Collaborating Centre for Tropical Diseases, Shanghai, 200025, People's Republic of China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, People's Republic of China
| | - Yun Feng
- Jiangsu Provincial Institute of Schistosomiasis Control, Wuxi, Jiangsu Province, 214064, People's Republic of China
| | - Song-Jun Ding
- Anhui Provincial Institute of Schistosomiasis Control, Hefei, Anhui Province, 230061, People's Republic of China
| | - Xiao-Wei Shan
- Hubei Provincial Institute of Schistosomiasis Control, Hubei Center for Disease Control, Wuhan, Hubei Province, 430079, People's Republic of China
| | - Guang-Ping Li
- Hunan Provincial Institute of Schistosomiasis Control, Hunan Province 414000, Yueyang, People's Republic of China
| | - Min Yuan
- Jiangxi Provincial Institute of Parasitic Disease, Nanchang, Jiangxi Province, 330006, People's Republic of China
| | - Jing Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), Shanghai, 200025, People's Republic of China. .,NHC Key Laboratory of Parasite and Vector Biology, Shanghai, 200025, People's Republic of China. .,WHO Collaborating Centre for Tropical Diseases, Shanghai, 200025, People's Republic of China. .,National Center for International Research on Tropical Diseases, Shanghai, 200025, People's Republic of China.
| | - Shi-Zhu Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention (Chinese Center for Tropical Diseases Research), Shanghai, 200025, People's Republic of China.,NHC Key Laboratory of Parasite and Vector Biology, Shanghai, 200025, People's Republic of China.,WHO Collaborating Centre for Tropical Diseases, Shanghai, 200025, People's Republic of China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, People's Republic of China
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Yang X, Huang T, Wang W. Multiple recurrent cystic hydatid disease of abdominal cavity. Asian J Surg 2022; 45:2415-2416. [DOI: 10.1016/j.asjsur.2022.05.074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 05/13/2022] [Indexed: 11/02/2022] Open
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10
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Gordon CA, Williams GM, Gray DJ, Clements ACA, Zhou XN, Li Y, Utzinger J, Kurscheid J, Forsyth S, Addis Alene K, Zhou J, Li Z, Li G, Lin D, Lou Z, Li S, Ge J, Xu J, Yu X, Hu F, Xie S, Chen J, Shi T, Li C, Zheng H, McManus DP. Schistosomiasis in the People's Republic of China - down but not out. Parasitology 2022; 149:218-233. [PMID: 35234601 PMCID: PMC11010531 DOI: 10.1017/s0031182021001724] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Revised: 09/30/2021] [Accepted: 10/01/2021] [Indexed: 11/06/2022]
Abstract
Schistosomiasis has been subjected to extensive control efforts in the People's Republic of China (China) which aims to eliminate the disease by 2030. We describe baseline results of a longitudinal cohort study undertaken in the Dongting and Poyang lakes areas of central China designed to determine the prevalence of Schistosoma japonicum in humans, animals (goats and bovines) and Oncomelania snails utilizing molecular diagnostics procedures. Data from the Chinese National Schistosomiasis Control Programme (CNSCP) were compared with the molecular results obtained.Sixteen villages from Hunan and Jiangxi provinces were surveyed; animals were only found in Hunan. The prevalence of schistosomiasis in humans was 1.8% in Jiangxi and 8.0% in Hunan determined by real-time polymerase chain reaction (PCR), while 18.3% of animals were positive by digital droplet PCR. The CNSCP data indicated that all villages harboured S. japonicum-infected individuals, detected serologically by indirect haemagglutination assay (IHA), but very few, if any, of these were subsequently positive by Kato-Katz (KK).Based on the outcome of the IHA and KK results, the CNSCP incorporates targeted human praziquantel chemotherapy but this approach can miss some infections as evidenced by the results reported here. Sensitive molecular diagnostics can play a key role in the elimination of schistosomiasis in China and inform control measures allowing for a more systematic approach to treatment.
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Affiliation(s)
- Catherine A. Gordon
- Department of Immunology, Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
| | - Gail M. Williams
- School of Population Health, Discipline of Epidemiology and Biostatistics, University of Queensland, Brisbane, Australia
| | - Darren J. Gray
- Department of Global Health, Research School of Population Health, Australian National University, Canberra, Australia
| | | | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Shanghai, People's Republic of China
| | - Yuesheng Li
- Department of Immunology, Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
- Hunan Institute of Schistosomiasis Control, Yueyang, Hunan, People's Republic of China
| | - Jürg Utzinger
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Johanna Kurscheid
- Department of Global Health, Research School of Population Health, Australian National University, Canberra, Australia
- Swiss Tropical and Public Health Institute, Basel, Switzerland
- University of Basel, Basel, Switzerland
| | - Simon Forsyth
- School of Population Health, Discipline of Epidemiology and Biostatistics, University of Queensland, Brisbane, Australia
| | | | - Jie Zhou
- Hunan Institute of Schistosomiasis Control, Yueyang, Hunan, People's Republic of China
| | - Zhaojun Li
- Jiangxi Institute of Parasitic Diseases, Jiangxi, People's Republic of China
| | - Guangpin Li
- Hunan Institute of Schistosomiasis Control, Yueyang, Hunan, People's Republic of China
| | - Dandan Lin
- Jiangxi Institute of Parasitic Diseases, Jiangxi, People's Republic of China
| | - Zhihong Lou
- Hunan Institute of Schistosomiasis Control, Yueyang, Hunan, People's Republic of China
| | - Shengming Li
- Hunan Institute of Schistosomiasis Control, Yueyang, Hunan, People's Republic of China
| | - Jun Ge
- Jiangxi Institute of Parasitic Diseases, Jiangxi, People's Republic of China
| | - Jing Xu
- National Institute of Parasitic Diseases, Shanghai, People's Republic of China
| | - Xinling Yu
- Hunan Institute of Schistosomiasis Control, Yueyang, Hunan, People's Republic of China
| | - Fei Hu
- Jiangxi Institute of Parasitic Diseases, Jiangxi, People's Republic of China
| | - Shuying Xie
- Jiangxi Institute of Parasitic Diseases, Jiangxi, People's Republic of China
| | - Jie Chen
- Chinese National Human Genome Center, Shanghai, People's Republic of China
| | - Tao Shi
- Chinese National Human Genome Center, Shanghai, People's Republic of China
| | - Chong Li
- Chinese National Human Genome Center, Shanghai, People's Republic of China
| | - Huajun Zheng
- Chinese National Human Genome Center, Shanghai, People's Republic of China
| | - Donald P. McManus
- Department of Immunology, Molecular Parasitology Laboratory, QIMR Berghofer Medical Research Institute, Brisbane, Australia
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Qiu Y, Yang X, Wang T, Shen S, Yang Y, Huang B, Wang W. Learning Curve of Ex Vivo Liver Resection and Autotransplantation in Treating End-Stage Hepatic Alveolar Echinococcosis: A RA-CUSUM Analysis. Front Surg 2021; 8:753968. [PMID: 34917647 PMCID: PMC8669302 DOI: 10.3389/fsurg.2021.753968] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 11/04/2021] [Indexed: 02/05/2023] Open
Abstract
Background: This retrospective study aimed to evaluate the safety and learning curve of ex vivo liver resection and autotransplantation (ELRA). Methods: A total of 102 consecutive end-stage HAE patients who underwent ELRA between 2014 and 2020 in West China Hospital were enrolled. The primary endpoint was major postoperative complications (comprehensive complication index, CCI > 26). The ELRA learning curve was evaluated using risk-adjusted cumulative sum (RA-CUSUM) methods. The learning phases were determined based on RA-CUSUM analysis and tested for their association with intra- and post-operative endpoints. Results: The median surgery time was 738 (659–818) min, with a median blood loss of 2,250 (1,600–3,000) ml. The overall incidence of major morbidity was 38.24% (39/102). Risk-adjusted cumulative sum analysis demonstrated a learning curve of 53 ELRAs for major postoperative complications. The learning phase showed a significant association with the hemodynamic unstable time (HR −30.29, 95% CI −43.32, −17.25, P < 0.0001), reimplantation time (HR −13.92, 95% CI −23.17, −4.67, P = 0.004), total postoperative stay (HR −6.87, 95% CI −11.33, −2.41, P = 0.0033), and postoperative major morbidity (HR 0.25, 95% CI 0.09, 0.68, p = 0.007) when adjusted for age, disease course, liver function, and remote metastasis. Discussion:Ex vivo liver resection and autotransplantation is feasible and safe with a learning curve of 53 cases for major postoperative complications.
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Affiliation(s)
- Yiwen Qiu
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
| | - Xianwei Yang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
| | - Tao Wang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
| | - Shu Shen
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
| | - Yi Yang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
| | - Bin Huang
- Department of Vascular Surgery, West China Hospital of Sichuan University, Chengdu, China
| | - Wentao Wang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, China
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Kadaleka S, Abelman S, Tchuenche JM. A Human-Bovine Schistosomiasis Mathematical Model with Treatment and Mollusciciding. Acta Biotheor 2021; 69:511-541. [PMID: 34191204 DOI: 10.1007/s10441-021-09416-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2020] [Accepted: 05/31/2021] [Indexed: 10/21/2022]
Abstract
To mitigate the spread of schistosomiasis, a deterministic human-bovine mathematical model of its transmission dynamics accounting for contaminated water reservoirs, including treatment of bovines and humans and mollusciciding is formulated and theoretically analyzed. The disease-free equilibrium is locally and globally asymptotically stable whenever the basic reproduction number [Formula: see text], while global stability of the endemic equilibrium is investigated by constructing a suitable Lyapunov function. To support the analytical results, parameter values from published literature are used for numerical simulations and where applicable, uncertainty analysis on the non-dimensional system parameters is performed using the Latin Hypercube Sampling and Partial Rank Correlation Coefficient techniques. Sensitivity analysis to determine the relative importance of model parameters to disease transmission shows that the environment-related parameters namely, [Formula: see text] (snails shedding rate of cercariae), [Formula: see text] (probability that cercariae shed by snails survive), c (fraction of the contaminated environment sprayed by molluscicides) and [Formula: see text] (mortality rate of cercariae) are the most significant to mitigate the spread of schistosomiasis. Mollusciciding, which directly impacts the contaminated environment as a single control strategy is more effective compared to treatment. However, concurrently applying mollusciciding and treatment will yield a better outcome.
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13
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Wang C, Qiu Y, Wang W. Application of ex vivo liver resection and autotransplantation in treating Budd-Chiari syndrome secondary to end-stage hepatic alveolar echinococcosis: A case series. Medicine (Baltimore) 2021; 100:e27075. [PMID: 34449508 PMCID: PMC8389916 DOI: 10.1097/md.0000000000027075] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/23/2021] [Accepted: 08/12/2021] [Indexed: 02/05/2023] Open
Abstract
BACKGROUND Secondary Budd-Chiari syndrome (BCS) occurs due to a blockage in the liver caused by invasion or compression by a large lesion. Conventional treatments for BCS do not solve practical problems, wherease liver transplantation has been only applied as a last-resort therapy and as the only opportunity for a radical cure. We explored the feasibility of applying ex vivo liver resection and autotransplantation (ELRA) for the new indications of treating patients with end-stage hepatic alveolar echinococcosis (HAE). Our center has firstly proposed the idea and successfully treated the 49 patients with HAE. This article for the first time reports the application of ELRA in treating patients with BCS secondary to HAE. METHODS According to the degree of lesion invasion and surgical options, 11 patients were divided into 4 types. These 11 patients had large lesions that invaded the second and third hilum of the caudate lobe and involved the confluence of the hepatic vein and the inferior vena cava, suprahepatic vena cava, or at least 2 hepatic veins and led to secondary BCS. The aim of the present work was to report 11 patients with life-threatening diseases who underwent ELRA (ex vivo liver resection and autotransplantation) for secondary BCS, to propose a classification system for secondary BCS, and to suggest that secondary BCS is an indication for ELRA. RESULTS Eleven patients successfully underwent ELRA without intraoperative mortality. The median autograft weight was 690 g (440-950 g); operative time was 12.5 hours (9.4-16.5 hours); Postoperative hospital stay was 15 days (7-21 days). Clavien-Dindo grade IIIa or higher postoperative complications occurred in only 5 patients. CONCLUSIONS This article for the first time reports the application of ELRA in treating patients with BCS secondary to HAE, not only provides new ideas for alternative treatments of secondary BCS, but also provides a classification system for secondary BCS. This article describes the technical process of outflow tract reconstruction and the experience for expanding the indications for ELRA. Our study demonstrated that ELRA is well feasible for treatment of BCS secondary to advanced HAE.
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Affiliation(s)
- Cong Wang
- Department of Liver Surgery, Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, Sichuan Province
- Department of Hepatopancreatobiliary Surgery, Affiliated Hospital of Qinghai University, Xining, Qinghai Province, China
| | - Yiwen Qiu
- Department of Liver Surgery, Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, Sichuan Province
| | - WenTao Wang
- Department of Liver Surgery, Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, Sichuan Province
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Prognostic value of plasma IL-27 on biological viability of hepatic cystic echinococcosis. Int J Infect Dis 2021; 109:63-71. [PMID: 34107327 DOI: 10.1016/j.ijid.2021.06.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2021] [Revised: 05/30/2021] [Accepted: 06/03/2021] [Indexed: 12/14/2022] Open
Abstract
OBJECTIVES To investigate potential biomarkers for distinguishing biological viability of hepatic cystic echinococcosis. METHODS Using Luminex assay we measured plasma concentrations of cytokine and chemokine in patients with active and non-active cysts (hepatic cystic echinococcosis (HCE), n = 47) and stable/progressive hepatic alveolar echinococcosis (HAE, n = 38), and in comparable infection-free volunteers (n = 48). Disease progression was staged according to the classification standard. RESULTS Compared with healthy controls, enhanced elevation was found of T helper 22 type cytokine interleukin (IL)-22 and chemokines Eotaxin, interferon-γ inducible protein-10, monocyte chemoattractant protein-1, and stromal cell-derived factor-1α concentrations in HAE patients, and IL-22, growth-related oncogene α, monocyte chemoattractant protein-1, regulated on activation normal T-expressed and secreted, and stromal cell-derived factor-1α concentrations in HCE patients (P < 0.05-0.001). For HCE patients, only IL-27 concentrations in non-active HCE were significantly lower than in active HCE. In logistic regression analysis, IL-27 <20.79 pg/mL was an independent risk factor for HCE biological viability with receiver operating characteristic analysis at a 44.23 pg/mL cut-off resulting in 0.72 area under the curve. CONCLUSIONS Our findings correlate multiple cytokine and chemokine secretion patterns in HAE and HCE patients with different disease progression stages. IL-27 could serve as a referring biomarker for distinguishing HCE biological viability and provide a preliminary foundation for clinical decision-making.
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Qian MB, Zhuang SF, Zhu SQ, Deng XM, Li ZX, Zhou XN. Epidemiology and determinants of clonorchiasis in school children in southeastern China. Acta Trop 2021; 216:105752. [PMID: 33188749 DOI: 10.1016/j.actatropica.2020.105752] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 10/17/2020] [Accepted: 10/18/2020] [Indexed: 11/17/2022]
Abstract
Clonorchiasis is an important food-borne parasitic disease in China because of the popularity in ingesting raw freshwater fish. To explore the epidemiology and determinants of clonorchiasis in children, a cross-sectional survey was implemented in two middle schools in Qiyang county, Hunan province, in southeastern China. Questionnaire survey and fecal examination were implemented. Questionnaires were fed back by 627 students, while stool samples were collected from 557 students, out of which 545 ones also provided questionnaire information. The percentage of students ingesting raw freshwater fish was 40.5% (254/627), while the prevalence with Clonorchis sinensis infection was 18.9% (105/557). Such factors contributed significantly to the students' practice in eating raw freshwater fish including boys, fathers' eating raw freshwater fish, mothers' eating raw freshwater fish, and preparation of raw freshwater fish at home, with an adjusted odds ratio of 1.9 (95% confidence intervals (95% CI): 1.3-2.8), 3.9 (95% CI: 2.3-6.5), 3.0 (95% CI: 1.8-4.8) and 2.8 (95% CI: 1.8-4.5), correspondingly. Ingestion of raw freshwater fish, fathers' eating raw freshwater fish and preparation of raw freshwater fish at home were risk factors of C. sinensis infection in students, and the adjusted odds ratio was 3.2 (95% CI: 1.9-5.5), 2.1 (95% CI: 1.1-3.9) and 1.8 (95% CI: 1.0-3.2), respectively. Thus, clonorchiasis was endemic in the surveyed schools due to the ingestion of raw freshwater fish, which is influenced by family environment. Education should be implemented in schools to promote behavioral change of eating raw freshwater fish.
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Affiliation(s)
- Men-Bao Qian
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research, Shanghai 200025, China; School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China; National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China; WHO Collaborating Centre for Tropical Diseases, Shanghai 200025, China.
| | - Shi-Feng Zhuang
- Hunan Center for Disease Control and Prevention, Changsha 410005, China
| | - Shi-Qiao Zhu
- Qiyang Center for Disease Control and Prevention, Qiyang 426100, China
| | - Xiao-Mao Deng
- Qiyang Center for Disease Control and Prevention, Qiyang 426100, China
| | - Zheng-Xiang Li
- Hunan Center for Disease Control and Prevention, Changsha 410005, China
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research, Shanghai 200025, China; School of Global Health, Chinese Center for Tropical Diseases Research, Shanghai Jiao Tong University School of Medicine, Shanghai 200025, China; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China; National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai 200025, China; WHO Collaborating Centre for Tropical Diseases, Shanghai 200025, China.
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Li HM, Qian YJ, Yang K, Ding W, Huang LL, Ma XJ, Duan L, Wang DQ, Guan YY, Xiao N, Zhou XN. Assessment of China's contributions to the Regional Network for Asian Schistosomiasis and Other Helminth Zoonoses: a questionnaire survey. Glob Health Res Policy 2021; 6:7. [PMID: 33597021 PMCID: PMC7887806 DOI: 10.1186/s41256-021-00186-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 01/15/2021] [Indexed: 11/30/2022] Open
Abstract
Background The Regional Network for Asian Schistosomiasis and Other Helminth Zoonoses (RNAS+) was established in 1998, which has developed close partnerships with Asian countries endemic for schistosomiasis and other helminthiasis in Asia. RNAS+ has provided an ideal regional platform for policy-makers, practitioners and researchers on the prevention, control and research of parasitic diseases in Asian countries. China, one of the initiating countries, has provided significant technical and financial support to the regional network. However, its roles and contributions have not been explored so far. The purpose of this study was to assess China's contributions on the supporting of RNAS+ development. Methods An assessment research framework was developed to evaluate China’s contributions to RNAS+ in four aspects, including capacity building, funding support, coordination, and cooperation. An anonymous web-based questionnaire was designed to acquire respondents’ basic information, and information on China’s contributions, challenges and recommendations for RNAS+development. Each participant scored from 0 to 10 to assess China’s contribution: “0” represents no contribution, and “10” represents 100% contribution. Participants who included their e-mail address in the 2017–2019 RNAS+ annual workshops were invited to participate in the assessment. Results Of 71 participants enrolled, 41 responded to the survey. 37 (37/41, 90.24%) of them were from RNAS+ member countries, while the other 4 (4/41, 9.76%) were international observers. Most of the respondents (38/41, 92.68%) were familiar with RNAS+. Respondents reported that China’s contributions mainly focused on improving capacity building, providing funding support, coordination responsibility, and joint application of cooperation programs on RNAS+ development. The average scores of China’s contributions in the above four fields were 8.92, 8.64, 8.75, and 8.67, respectively, with an overall assessment score of 8.81 (10 for a maximum score). The challenge of RNAS+ included the lack of sustainable funding, skills, etc. and most participants expressed their continual need of China’s support. Conclusions This survey showed that China has played an important role in the development of RNAS+ since its establishment. This network-type organization for disease control and research can yet be regarded as a great potential pattern for China to enhance regional cooperation. These findings can be used to promote future cooperation between China and other RNAS+ member countries.
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Affiliation(s)
- Hong-Mei Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Ying-Jun Qian
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Kun Yang
- Jiangsu Institute of Parasitic Diseases, Wuxi, 214064, China
| | - Wei Ding
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Lu-Lu Huang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Xue-Jiao Ma
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Lei Duan
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Duo-Quan Wang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Ya-Yi Guan
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Ning Xiao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention; Chinese Center for Tropical Diseases Research; WHO Collaborating Centre for Tropical Diseases; National Center for International Research on Tropical Diseases, Ministry of Science and Technology; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China.
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17
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Wu Y, Tian X, Song N, Huang M, Wu Z, Li S, Waterfield NR, Zhan B, Wang L, Yang G. Application of Quantitative PCR in the Diagnosis and Evaluating Treatment Efficacy of Leishmaniasis. Front Cell Infect Microbiol 2020; 10:581639. [PMID: 33117735 PMCID: PMC7575730 DOI: 10.3389/fcimb.2020.581639] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 09/11/2020] [Indexed: 11/21/2022] Open
Abstract
Leishmaniasis is still a serious neglected tropical disease that may cause death in infected individuals. At present, the clinical diagnosis and treatment monitoring still rely on parasitological culture and microscopy that needs experienced technicians. The low sensitivity and inconvenience of microscopic examination could cause misdiagnosis and relapse of leishmaniasis. There is an urgent need for developing a sensitive and easily operated diagnostic method for the diagnosis and disease management of leishmaniasis. Thus, a quantitative real-time PCR (qPCR) based on the conversed regions of kinetoplast minicircle DNA (mkDNA) of Leishmania spp. was developed to detect different species of Leishmania. The designed mkDNA-based qPCR was able to detect as low as one copy of Leishmania mkDNA or DNA from single parasite. It also detected Pan-Leishmania protozoa including Leishmania donovani, Leishmania infantum and Leishmania major without cross-reaction with other pathogen DNAs available in our lab. This method was clinically applied to quantitatively detect skin lesion samples from 20 cutaneous leishmaniasis (CL) and bone marrow and/or PBMC samples from 30 current and cured visceral leishmaniasis (VL) patients, and blood samples from 11 patients with other infections and 5 normal donors as well. Total 20 skin lesion samples from current CL patients and 20 bone marrow and/or PBMC samples from current VL patients were all detected as positive with qPCR without cross-reaction with samples from patients with malaria, brucellosis and dengue or normal donors. Two VL patients with parasite converted to microscopically negative after treatment were detected positive with qPCR. The patients with bigger skin lesion in CL and higher level of immunoglobulin or splenomegaly in VL, had the higher parasite load detected by qPCR. The parasite load was significantly reduced after treatment. In conclusion, the mkDNA-based qPCR assay that we developed in this study can be used not only for diagnosis of both cutaneous and visceral leishmaniasis with high sensitivity and specificity, but also for evaluating the severity and treatment efficacy of this disease, presenting a rapid and accurate tool for clinical surveillance, treatment monitoring and the end point determination of leishmaniasis.
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Affiliation(s)
- Yun Wu
- Emergency and Critical Care Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Tropical Medicine, Beijing, China
| | - Xiaojun Tian
- Emergency and Critical Care Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Tropical Medicine, Beijing, China
| | - Nan Song
- Emergency and Critical Care Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Tropical Medicine, Beijing, China
| | - Minjun Huang
- Emergency and Critical Care Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Tropical Medicine, Beijing, China
| | - Zhaoyong Wu
- Emergency and Critical Care Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Tropical Medicine, Beijing, China
| | - Shaogang Li
- Emergency and Critical Care Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Tropical Medicine, Beijing, China
| | | | - Bin Zhan
- Department of Pediatrics and National School of Tropical Medicine, Baylor College of Medicine, Houston, TX, United States
| | - Lei Wang
- Emergency and Critical Care Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Tropical Medicine, Beijing, China
| | - Guowei Yang
- Emergency and Critical Care Center, Beijing Friendship Hospital, Capital Medical University, Beijing, China.,Beijing Institute of Tropical Medicine, Beijing, China
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18
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Guo JY, Xu J, Zhang LJ, Lv S, Cao CL, Li SZ, Zhou XN. Surveillance on schistosomiasis in five provincial-level administrative divisions of the People's Republic of China in the post-elimination era. Infect Dis Poverty 2020; 9:136. [PMID: 33004080 PMCID: PMC7528395 DOI: 10.1186/s40249-020-00758-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2020] [Accepted: 09/22/2020] [Indexed: 02/15/2023] Open
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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Affiliation(s)
- Jing-Yi Guo
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, Chinese Center for Tropical Disease Research, Shanghai, 200025, People's Republic of China
| | - Jing Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, Chinese Center for Tropical Disease Research, Shanghai, 200025, People's Republic of China
| | - Li-Juan Zhang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, Chinese Center for Tropical Disease Research, Shanghai, 200025, People's Republic of China.
| | - Shan Lv
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, Chinese Center for Tropical Disease Research, Shanghai, 200025, People's Republic of China
| | - Chun-Li Cao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, Chinese Center for Tropical Disease Research, Shanghai, 200025, People's Republic of China
| | - Shi-Zhu Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, Chinese Center for Tropical Disease Research, Shanghai, 200025, People's Republic of China
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, WHO Collaborating Centre for Tropical Diseases, Chinese Center for Tropical Disease Research, Shanghai, 200025, People's Republic of China
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19
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Liu Y, Abuzeid AMI, Huang Y, He L, Zhao Q, Zhu S, Zhuang T, Chen X, Li X, Liu J, Li G. Molecular cloning, expression and characterization of aspartyl protease inhibitor from Ancylostoma ceylanicum. VETERINARY PARASITOLOGY- REGIONAL STUDIES AND REPORTS 2020; 22:100464. [PMID: 33308749 DOI: 10.1016/j.vprsr.2020.100464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 08/28/2020] [Accepted: 09/08/2020] [Indexed: 11/26/2022]
Abstract
Aspartyl protease inhibitors (APIs) from parasitic intestinal nematodes are highly immunogenic and have been suggested as potential vaccine antigens. Ac-API-1 from Ancylostoma caninum showed strong immunogenicity and its polyclonal antibodies could specifically recognize the excretory/secretory products of adult worms. However, little is known about molecular characteristics and biological function of API from Ancylostoma ceylanicum (Ace-API). In this study, the Ace-API mature peptide coding sequence was cloned and expressed, and molecular characteristics of its full length sequence were analyzed. Ace-API cDNA was 684 bp in length, which encoded 228 amino acids. The similarity of the Ace-API amino acid sequence to Ac-API-1 and Adu-API-1 was 96.93% and 96.49%, respectively, and they clustered together in the phylogenetic tree. Escheria coli-expressed recombinant protein was mainly soluble in the supernatant of bacterial cell lysate. Western blot showed that Ace-API protein had good reactivity to the serum of infected dogs. Pepsin inhibition assay revealed that the recombinant protein had inhibitory activity on pepsin. Immunofluorescence results demonstrated that Ace-API was mainly localized to the epidermis, excretory glands, and pseudocoelomic fluid of the adult. Using the quantitative real-time PCR, the expression of Ace-api mRNA in adults was significantly higher than that in the third stage (L3) larvae. Together, these data indicate that Ace-API is secreted extracellularly by the parasite, and might play a role in protecting the parasite against the proteolytic digestion by the host proteases, which stimulate further studies to explore this protein as a potential hookworm vaccine candidate.
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Affiliation(s)
- Yunqiu Liu
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Asmaa M I Abuzeid
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Yue Huang
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Long He
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Qi Zhao
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Shilan Zhu
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Tingting Zhuang
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Xiaoyu Chen
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Xiu Li
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Jumei Liu
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Guoqing Li
- Guangdong Provincial Zoonosis Prevention and Control Key Laboratory, College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China.
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20
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Abe EM, Tambo E, Xue J, Xu J, Ekpo UF, Rollinson D, Yang K, Li SZ, Zhou XN. Approaches in scaling up schistosomiasis intervention towards transmission elimination in Africa: Leveraging from the Chinese experience and lessons. Acta Trop 2020; 208:105379. [PMID: 32006521 DOI: 10.1016/j.actatropica.2020.105379] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2018] [Revised: 01/29/2020] [Accepted: 01/29/2020] [Indexed: 12/20/2022]
Abstract
Schistosoma japonicum, differs from the African species including S. mansoni and S. haematobium, is a zoonotic parasite as it infects both human and animals including domestic ruminant animals such as cattle and animals from the wild. Considering China's success story in the elimination of schistosomiasis, the China-Africa collaboration on schistosomaisis elimination in Africa is an important cooperative health development initiative. This review examines the importance of China-Africa collaboration on schistosomiasis elimination using effective surveillance-response intervention strategy as the platform to effectively drive the elimination of schistosomiasis in Africa. Three conclusions were made after reviewing the similarity and differences in schistososmiasis control programmes between China and African continent as follows: (i) Politically, China's lessons is that leveraging on the integrated control strategies and the recognition that schistosomiasis is a public health problem which prompted the interest of government in China. It is necessary for African leaders and governments to recognize schistosomiasis as a public health challenge that must be given serious attention in terms of funding and setting up frameworks to complement control efforts. (ii) Technically, efficient monitoring and surveillance system mechanism will facilitate contextual and effective management of schistosomiasis elimination across different environment, and African programme managers should embrace the use of appropriate diagnostic tools to guide treatment strategies at different thresholds of schistosomiasis control. (iii) Strategically, effective control of snail intermediate hosts and precision mapping of snail distribution should be prioritized for successful schistosomiasis elimination in Africa.
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Affiliation(s)
- Eniola M Abe
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China.
| | - E Tambo
- Département de Biochimie et Science Pharmaceutiques, Université des Montagnes, Bagangté, République du Cameroon.
| | - Jingbo Xue
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China.
| | - Jing Xu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China.
| | - Uwem F Ekpo
- Department of Pure and Applied Zoology, Federal University of Agriculture, Alabata Road, Abeokuta, 110001, Nigeria.
| | - David Rollinson
- The Natural History Museum, Cromwell Road, London SW7 5BD, United Kingdom.
| | - Kun Yang
- Jiangsu Institute of Parasitic Diseases, Wuxi, China.
| | - Shi-Zhu Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China.
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai 200025, China; WHO Collaborating Centre for Malaria, Schistosomiasis and Filariasis, Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai 200025, China.
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21
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Qian MB, Jiang ZH, Ge T, Wang X, Zhou CH, Zhu HH, Zhou XN. Rapid screening of Clonorchis sinensis infection: Performance of a method based on raw-freshwater fish-eating practice. Acta Trop 2020; 207:105380. [PMID: 32007446 DOI: 10.1016/j.actatropica.2020.105380] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 01/29/2020] [Accepted: 01/29/2020] [Indexed: 01/09/2023]
Abstract
Clonorchis sinensis infection is caused by ingestion of raw freshwater fish containing the infective larvae of Clonorchis sinensis. It is highly endemic in East Asia, especially in China. Selective chemotherapy of people who report habitual eating of raw freshwater fish is a control measure. As the performance of this screening technique has not yet been fully evaluated in China, a cross-sectional study was conducted, covering 17 counties in four major clonorchiasis-endemic provinces. About 1 000 participants were enrolled from each county. Fecal samples were collected and examined for helminth eggs and each person enrolled was asked about their practice with respect to eating raw freshwater fish. In total, 16 230 participants from 16 counties were finally included. The overall prevalence of C. sinensis infection was 10.8%, ranging from 0 to 53.7% in the 16 counties, while the percentage of inhabitants eating raw freshwater fish was 26.5%, ranging from 0 to 79.1%. The overall sensitivity and specificity of screening for C. sinensis infection in this approach was 82.3% and 80.3%, respectively, yielding a Youden's index of 0.6. The overall positive and negative likelihood ratios were 4.2 and 0.2, respectively, while the overall positive and negative predictive values were 33.5% and 97.4%, respectively. Furthermore, the sensitivity was higher with regard to high-intensity infections compared to light infections.
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22
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Zahran F, Ezz El-Din HM, Shehata MAS. Study on the effect of an ion channel inhibitor "Fluralaner" on Echinococcus granulosus protoscolices and metacestode layers in vitro. J Parasit Dis 2020; 44:411-419. [PMID: 32508416 DOI: 10.1007/s12639-020-01224-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 04/12/2020] [Indexed: 02/05/2023] Open
Abstract
Hydatid disease has a great impact on public health, causing high morbidity and mortality. Main lines of treatment include surgery, which mostly requires the installation of a scolicidal agent into hydatid cysts to prevent dissemination. Alternatively, medical treatment involves the use of benzimidazole drugs; however, the results are not satisfactory, and new drug compounds are urgently needed. Fluralaner is a potent inhibitor of GABA-gated chloride channels and L-glutamate-gated chloride channels (GluCls) providing immediate and persistent flea, tick and mite control in dogs after a single oral dose. Researches previously identified different genes encoding ion channels in Echinococcus granulosus, making ion channel inhibitors a promising target for treating hydatid disease. Thus, the present study aimed to evaluate the effect of fluralaner on protoscolices and metacestode layers. Parasite materials (Protoscolices, Metacestodes layers) were exposed to different concentrations of the drug ranging from "12.5-100 ug/ml" and examined for viability after 1, 6 and 24 h. Morphological and ultrastructural alterations were recorded by both light and electron microscopies. Immunohistochemical staining confirmed caspase-3 activation as an indicator of apoptosis- induced therapy. The treated protoscolices and metacestode layers showed loss of the viability, the formation of vacuoles and lipid droplets, separation of the germinal layer, and damage in the laminated layer; apoptosis was prominent after treatment. These findings revealed that fluralaner has a potent scolicidal activity and suggested its therapeutic potential against hydatid disease. Further evaluations for animals and human use in the treatment and prevention of hydatid disease are needed.
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Affiliation(s)
- Fatima Zahran
- Faculty of Medicine, Ain-Shams University, Ramsis St., Abbassia, Cairo, 11591 Egypt
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23
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Qian MB, Xiao N, Li SZ, Abela-Ridder B, Carabin H, Fahrion AS, Engels D, Zhou XN. Control of taeniasis and cysticercosis in China. ADVANCES IN PARASITOLOGY 2020; 110:289-317. [PMID: 32563329 DOI: 10.1016/bs.apar.2020.04.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
National surveys suggest that the prevalence of taeniasis has considerably decreased in China, while reported cases indicated T. solium cysticercosis was historically highly endemic in northeastern, central and southwestern China. The high prevalence of taeniasis and cysticercosis there was driven by socio-ecological determinants. Cysticercosis may occur in the central nervous system, spinal cord, subcutaneous muscle, eyes, heart and oral cavity. Neurocysticercosis, the clinically most important type, causes epilepsy, increased intracranial pressure and neuropsychiatric symptoms. New molecular diagnostic techniques have been introduced for high sensitivity and discrimination of Taenia species. Immunological methods remain useful in the diagnosis of cysticercosis, especially neurocysticercosis. The introduction of imaging techniques including computed tomography and magnetic resonance imaging has significantly improved the diagnosis of neurocysticercosis. Recently, a combination of pumpkin seeds and areca nut has been explored against taeniasis, while praziquantel and albendazole are administrated simultaneously against cysticercosis, with promising efficacy and low side-effects. The widespread adoption of deworming protocols and techniques for inspection, management and treatment of pigs as well as improved sewage management has contributed to the significant decrease of taeniasis and cysticercosis in northern China. The positive results of these techniques should now be extended to highly endemic areas in western China to achieve the national elimination target for taeniasis and cysticercosis. Elimination of taeniasis and cysticercosis in China will not only benefit public health within China but also set an important example for less developed countries.
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Affiliation(s)
- Men-Bao Qian
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, People's Republic of China; Chinese Center for Tropical Diseases Research, Shanghai, People's Republic of China; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, People's Republic of China; National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai, People's Republic of China; WHO Collaborating Centre for Tropical Diseases, Shanghai, People's Republic of China
| | - Ning Xiao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, People's Republic of China; Chinese Center for Tropical Diseases Research, Shanghai, People's Republic of China; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, People's Republic of China; National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai, People's Republic of China; WHO Collaborating Centre for Tropical Diseases, Shanghai, People's Republic of China
| | - Shi-Zhu Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, People's Republic of China; Chinese Center for Tropical Diseases Research, Shanghai, People's Republic of China; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, People's Republic of China; National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai, People's Republic of China; WHO Collaborating Centre for Tropical Diseases, Shanghai, People's Republic of China
| | - Bernadette Abela-Ridder
- Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Hélène Carabin
- Department of Biostatistics and Epidemiology, College of Public Health, University of Oklahoma Health Sciences Center, Oklahoma City, OK, United States
| | - Anna Sophie Fahrion
- Department of Control of Neglected Tropical Diseases, World Health Organization, Geneva, Switzerland
| | - Dirk Engels
- Uniting to Combat NTDs Secretariat, Geneva, Switzerland
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, People's Republic of China; Chinese Center for Tropical Diseases Research, Shanghai, People's Republic of China; Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, People's Republic of China; National Center for International Research on Tropical Diseases, Ministry of Science and Technology, Shanghai, People's Republic of China; WHO Collaborating Centre for Tropical Diseases, Shanghai, People's Republic of China.
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Zeng X, Yang X, Yang P, Luo H, Wang W, Yan L. Individualized biliary reconstruction techniques in autotransplantation for end-stage hepatic alveolar echinococcosis. HPB (Oxford) 2020; 22:578-587. [PMID: 31471064 DOI: 10.1016/j.hpb.2019.08.003] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2019] [Revised: 06/02/2019] [Accepted: 08/06/2019] [Indexed: 02/08/2023]
Abstract
BACKGROUND Biliary reconstruction in ex vivo liver resection followed by autotransplantation (ERAT) for end-stage hepatic alveolar echinococcosis (HAE) remains the most challenging step, we present our experience with this complex procedure. METHODS A retrospective data analysis of 55 patients with end-stage HAE underwent ERAT, the biliary reconstruction techniques and short- and long-term outcomes were discussed. RESULTS All autografts were derived from the left lateral section after extensive ex vivo liver resection, multiple bile ducts were observed in 52 (94.5%) patients, and forty-four (80.0%) cases required ductoplasty. Biliary reconstruction was achieved with duct-to-duct anastomosis in 32 (58.2%) patients, Roux-en-Y hepaticojejunostomy (RYHJ) in 14 (25.5%) patients, and a combination of the two methods in 9 (16.4%) patients. Twenty (36.4%) patients had multiple anastomoses. Biliary leakage occurred in 8 (14.5%) patients postoperatively. Three (5.5%) patients died of liver failure, cerebral hemorrhage and intraabdominal bleeding. During a median of 31 months followed-up time, 3 (5.5%) patients developed anastomotic stricture, 1 of whom was treated by repeat RYHJ, while the others were managed with stenting. CONCLUSIONS With a well-designed plan and precise anastomosis, complex biliary reconstruction in ERAT can be performed with few biliary complications by a professional team.
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Affiliation(s)
- Xintao Zeng
- Department of Liver Surgery & Liver Transplantation Center, West China Hospital, Sichuan University, Chengdu, China; Department of Hepatobiliary Surgery, Mianyang Central Hospital, Sichuan, Mianyang, China
| | - Xianwei Yang
- Department of Liver Surgery & Liver Transplantation Center, West China Hospital, Sichuan University, Chengdu, China
| | - Pei Yang
- Department of Hepatobiliary Surgery, Mianyang Central Hospital, Sichuan, Mianyang, China
| | - Hua Luo
- Department of Hepatobiliary Surgery, Mianyang Central Hospital, Sichuan, Mianyang, China
| | - Wentao Wang
- Department of Liver Surgery & Liver Transplantation Center, West China Hospital, Sichuan University, Chengdu, China.
| | - Lunan Yan
- Department of Liver Surgery & Liver Transplantation Center, West China Hospital, Sichuan University, Chengdu, China
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25
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Sun CS, Luo F, Liu X, Miao F, Hu W. Oncomelania hupensis retains its ability to transmit Schistosoma japonicum 13 years after migration from permissive to non-permissive areas. Parasit Vectors 2020; 13:146. [PMID: 32188510 PMCID: PMC7081574 DOI: 10.1186/s13071-020-4004-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 03/03/2020] [Indexed: 12/25/2022] Open
Abstract
Background The East Route Project (ERP) of the South-to-North Water Diversion Project (SNWDP) stretches across schistosomiasis endemic and non-endemic areas in China, which may lead to the dispersal of Oncomelania hupensis, the intermediate host of Schistosoma japonicum, from permissive areas along the Yangtze River Basin to non-permissive areas in northern China. A previous survey demonstrated that O. hupensis could survive and breed for 13 years (12 generations) after being transferred to a non-permissive area, and could be infected by S. japonicum. However, it is not clear if the migrated snails will change their ability to transmit S. japonicum. Methods We infected mice with the cercariae released from the infected transferred snails bred in Jining city of Shandong Province (non-permissive areas) for 13 years. The mice in the control group were infected with cercariae derived from the snails collected in their original habitat (Jiangdu county of Jiangsu Province, permissive areas). Then, we explored the pathogenicity to mice including worm burden, liver egg count and pathology. Additionally, the gene expression profiles of the adult male and female worms recovered from the infected mice were analyzed by RNA sequencing. Results The worm burden, liver egg count and pathology of the mice infected with cercariae released from transferred snails bred in non-permissive areas for 13 years showed no significant differences, when compared with the control cercariae. Slight changes occurred at the transcription level between adult male and female worms recovered from mice infected with cercariae derived from snails bred in permissive and non-permissive areas. Only fourteen genes were significantly differentially expressed in the comparison of adult female worms, and no significantly differentially expressed gene was found in the comparison of adult male worms. Conclusions Our findings strongly suggest that transferred snails did not change their schistosomiasis transmission ability and the worms derived from them retained the original pathogenicity, even after migrating from permissive to non-permissive areas for 13 years. Therefore, a long-term surveillance system of snails along the SNWDP is urgently needed to prevent the diffusion of O. hupensis and reduce the risk of transmission of schistosomiasis.![]()
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Affiliation(s)
- Cheng-Song Sun
- Department of Infectious Diseases, Huashan Hospital, State Key Laboratory of Genetic Engineering, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, 200438, People's Republic Of China.,Anhui Provincial Institute of Parasitic Diseases, Hefei, 230061, Anhui Province, People's Republic Of China
| | - Fang Luo
- Department of Infectious Diseases, Huashan Hospital, State Key Laboratory of Genetic Engineering, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, 200438, People's Republic Of China
| | - Xin Liu
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, Jining, 272033, Shandong Province, People's Republic Of China
| | - Feng Miao
- Shandong Institute of Parasitic Diseases, Shandong First Medical University & Shandong Academy of Medical Sciences, Jining, 272033, Shandong Province, People's Republic Of China.
| | - Wei Hu
- Department of Infectious Diseases, Huashan Hospital, State Key Laboratory of Genetic Engineering, Ministry of Education Key Laboratory for Biodiversity Science and Ecological Engineering, Ministry of Education Key Laboratory of Contemporary Anthropology, School of Life Sciences, Fudan University, Shanghai, 200438, People's Republic Of China. .,National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Key Laboratory of Parasite and Vector Biology of China Ministry of Health, WHO Collaborating Centre for Tropical Diseases, Joint Research Laboratory of Genetics and Ecology on Parasite-host Interaction, Chinese Center for Disease Control and Prevention & Fudan University, Shanghai, China.
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26
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Lass A, Ma L, Kontogeorgos I, Xueyong Z, Li X, Karanis P. Contamination of wastewater with Echinococcus multilocularis - possible implications for drinking water resources in the QTP China. WATER RESEARCH 2020; 170:115334. [PMID: 31794889 DOI: 10.1016/j.watres.2019.115334] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Revised: 11/20/2019] [Accepted: 11/23/2019] [Indexed: 06/10/2023]
Abstract
Echinococcus multilocularis is a parasite that causes a dangerous zoonosis, alveolar echinococcosis (AE). Its presence in water sources, however, has scarcely been studied heretofore. Accordingly, 222 samples of different origin including wastewater from wastewater treatment plants (WWTPs) (n = 137), slaughterhouse (n = 49) as well as water from rivers (n = 26) and a cattle farm (n = 10) were collected from Xining City and a rural area in Qinghai-Tibet Plateau (QTP), an endemic area. Material obtained after processing of 10 L volume samples was subsequently analysed using three molecular detection methods: nested PCR, real-time PCR and LAMP. E. multilocularis DNA was found in 13 (5.85%) water samples; including 8 (5.8%), 3 (6%), 2 (20%) and 0 positive samples found in WWTPs, a slaughterhouse, a cattle farm and rivers, respectively. All three (LAMP, PCR, RT-PCR) molecular tools displayed high agreement and effectiveness in their ability of detecting the parasite's DNA in environmental material. This is the first investigation describing E. multilocularis detection in wastewater samples, using three sensitive molecular diagnostic tools. Results indicate the role of wastewater in dissemination of E. multilocularis and the risk of contamination of water sources.
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Affiliation(s)
- Anna Lass
- State Key Laboratory of Plateau Ecology and Agriculture, Center for Biomedicine and Infectious Disease, Qinghai University, 1#Wei'er Road, Qinghai Biological Scientific Estate Garden, Xining, 810016, PR China; Department of Tropical Parasitology, Institute of Maritime and Tropical Medicine in Gdynia, Medical University of Gdansk, 9b Powstania Styczniowego Str, 81-519, Gdynia, Poland
| | - Liqing Ma
- State Key Laboratory of Plateau Ecology and Agriculture, Center for Biomedicine and Infectious Disease, Qinghai University, 1#Wei'er Road, Qinghai Biological Scientific Estate Garden, Xining, 810016, PR China
| | - Ioannis Kontogeorgos
- Marine Sciences Department, School of Environment, University of the Aegean, University Hill, 88 100, Mytilene, Greece
| | - Zhang Xueyong
- State Key Laboratory of Plateau Ecology and Agriculture, Center for Biomedicine and Infectious Disease, Qinghai University, 1#Wei'er Road, Qinghai Biological Scientific Estate Garden, Xining, 810016, PR China
| | - Xiuping Li
- State Key Laboratory of Plateau Ecology and Agriculture, Center for Biomedicine and Infectious Disease, Qinghai University, 1#Wei'er Road, Qinghai Biological Scientific Estate Garden, Xining, 810016, PR China
| | - Panagiotis Karanis
- State Key Laboratory of Plateau Ecology and Agriculture, Center for Biomedicine and Infectious Disease, Qinghai University, 1#Wei'er Road, Qinghai Biological Scientific Estate Garden, Xining, 810016, PR China; University of Cologne, Faculty of Medicine and University Hospital Cologne, Cologne, Germany; Nicosia University Medical School, Department of Basic and Clinical Sciences, Nicosia, 2408, Cyprus.
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Yoshida A, Doanh PN, Maruyama H. Paragonimus and paragonimiasis in Asia: An update. Acta Trop 2019; 199:105074. [PMID: 31295431 DOI: 10.1016/j.actatropica.2019.105074] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Revised: 05/28/2019] [Accepted: 07/05/2019] [Indexed: 01/22/2023]
Abstract
Paragonimiasis, or lung fluke disease, is a typical food-borne parasitic zoonosis caused by infection with trematodes belonging to the genus Paragonimus. More than 50 species of Paragonimus have been reported throughout the world, of which seven valid species infect humans, an estimated one million people annually worldwide. Among the seven species, P. westermani, P. heterotremus, and P. skrjabini/P. s. miyazakii, distributed in Asia, are the most important species as the cause of paragonimiasis. Humans acquire infection through the ingestion of raw, pickled or undercooked freshwater crustaceans, 2nd intermediate hosts, or consuming raw meat of wild boar or deer, paratenic hosts. Infections often occur clustered in foci where dietary habits allow transmission of the parasites. Paragonimiasis typically causes a subacute to chronic inflammatory disease of the lungs. The symptoms, including chronic cough, chest pain, dyspnea and hemoptysis, mimic those of tuberculosis and lung cancer. Serologic tests are commonly used for the diagnosis of paragonimiasis, and Praziquantel is the treatment of choice. In this review, the current status of Paragonimus and paragonimiasis in Asia is outlined based on the latest information and findings. We also summarize current trends of paragonimiasis in Japan, which is one of the most endemic area of paragonimiasis in the world, for the better understanding and control of paragonimiasis.
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Qian MB, Chen J, Bergquist R, Li ZJ, Li SZ, Xiao N, Utzinger J, Zhou XN. Neglected tropical diseases in the People's Republic of China: progress towards elimination. Infect Dis Poverty 2019; 8:86. [PMID: 31578147 PMCID: PMC6775666 DOI: 10.1186/s40249-019-0599-4] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Accepted: 09/20/2019] [Indexed: 02/08/2023] Open
Abstract
Since the founding of the People’s Republic of China in 1949, considerable progress has been made in the control and elimination of the country’s initial set of 11 neglected tropical diseases. Indeed, elimination as a public health problem has been declared for lymphatic filariasis in 2007 and for trachoma in 2015. The remaining numbers of people affected by soil-transmitted helminth infection, clonorchiasis, taeniasis, and echinococcosis in 2015 were 29.1 million, 6.0 million, 366 200, and 166 100, respectively. In 2017, after more than 60 years of uninterrupted, multifaceted schistosomiasis control, has seen the number of cases dwindling from more than 10 million to 37 600. Meanwhile, about 6000 dengue cases are reported, while the incidence of leishmaniasis, leprosy, and rabies are down at 600 or fewer per year. Sustained social and economic development, going hand-in-hand with improvement of water, sanitation, and hygiene provide the foundation for continued progress, while rigorous surveillance and specific public health responses will consolidate achievements and shape the elimination agenda. Targets for poverty elimination and strategic plans and intervention packages post-2020 are important opportunities for further control and elimination, when remaining challenges call for sustainable efforts.
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Affiliation(s)
- Men-Bao Qian
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, Key Laboratory of Parasite and Vector Biology, Ministry of Health, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, WHO Collaborating Center for Tropical Diseases, Shanghai, People's Republic of China
| | - Jin Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, Key Laboratory of Parasite and Vector Biology, Ministry of Health, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, WHO Collaborating Center for Tropical Diseases, Shanghai, People's Republic of China
| | | | - Zhong-Jie Li
- Key Laboratory of Surveillance and Early-warning on Infectious Disease, Chinese Center for Disease Control and Prevention, Beijing, People's Republic of China
| | - Shi-Zhu Li
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, Key Laboratory of Parasite and Vector Biology, Ministry of Health, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, WHO Collaborating Center for Tropical Diseases, Shanghai, People's Republic of China
| | - Ning Xiao
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, Key Laboratory of Parasite and Vector Biology, Ministry of Health, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, WHO Collaborating Center for Tropical Diseases, Shanghai, People's Republic of China
| | - Jürg Utzinger
- Swiss Tropical and Public Health Institute, Basel, Switzerland.,University of Basel, Basel, Switzerland
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Chinese Center for Tropical Diseases Research, Key Laboratory of Parasite and Vector Biology, Ministry of Health, National Center for International Research on Tropical Diseases, Ministry of Science and Technology, WHO Collaborating Center for Tropical Diseases, Shanghai, People's Republic of China.
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Ito A, Li T, Wandra T, Dekumyoy P, Yanagida T, Okamoto M, Budke CM. Taeniasis and cysticercosis in Asia: A review with emphasis on molecular approaches and local lifestyles. Acta Trop 2019; 198:105075. [PMID: 31295430 DOI: 10.1016/j.actatropica.2019.105075] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 05/14/2019] [Accepted: 07/05/2019] [Indexed: 02/07/2023]
Abstract
Taeniasis is an important parasitic condition in Asia, especially since all three human-infecting Taenia spp., Taenia solium, Taenia saginata, and Taenia asiatica are found in this region. These three species are believed to be sympatrically distributed, with the largest disease burden found in remote and rural areas where people raise pigs and cattle in a traditional manner. Recent studies revealed that T. asiatica and T. saginata are genetically-related sister species that are not completely reproductively isolated from each other. Current evidence indicates that most T. asiatica adult worms are hybrid-derived descendants. Moving forward, nuclear DNA analysis will be critical in further assessing the species circulating locally. Lifestyle choices, such as the consumption of undercooked meat, are important in maintaining the life cycles of these parasites. In addition, poor hygiene and sanitation, in highly endemic areas, make disease control difficult, resulting in the need for sustainable education programs. An overview of the present situation of taeniasis and cysticercosis in Asia is provided, followed by a discussion of molecular approaches to species assessment and the impact of human lifestyles on parasite transmission.
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Affiliation(s)
- Akira Ito
- Department of Parasitology and Laboratory of NTDs, Asahikawa Medical University, Asahikawa, Japan.
| | - Tiaoying Li
- Institute of Parasitic Diseases, Sichuan Centers for Disease Control and Prevention, Chengdu, People's Republic of China
| | - Toni Wandra
- Directorate of Postgraduate, Sari Mutiara Indonesia University, Medan, Indonesia
| | - Paron Dekumyoy
- Department of Helminthology, Faculty of Tropical Medicine, Mahidol University, Bangkok, Thailand
| | - Tetsuya Yanagida
- Laboratory of Veterinary Parasitology, Joint Faculty of Veterinary Medicine, Yamaguchi University, Yamaguchi, Japan
| | - Munehiro Okamoto
- Center for Human Evolution Modeling Research, Primate Research Institute, Kyoto University, Inuyama, Japan
| | - Christine M Budke
- Department of Veterinary Integrative Biosciences, College of Veterinary Medicine & Biomedical Sciences, Texas A & M University, College Station, Texas, USA
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30
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Cheng CY, Wang N, Wong TY, Congdon N, He M, Wang YX, Braithwaite T, Casson RJ, Cicinelli MV, Das A, Flaxman SR, Jonas JB, Keeffe JE, Kempen JH, Leasher J, Limburg H, Naidoo K, Pesudovs K, Resnikoff S, Silvester AJ, Tahhan N, Taylor HR, Bourne RRA. Prevalence and causes of vision loss in East Asia in 2015: magnitude, temporal trends and projections. Br J Ophthalmol 2019; 104:616-622. [PMID: 31462416 DOI: 10.1136/bjophthalmol-2018-313308] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Revised: 07/21/2019] [Accepted: 08/11/2019] [Indexed: 01/20/2023]
Abstract
BACKGROUND To determine the prevalence and causes of blindness and vision impairment (VI) in East Asia in 2015 and to forecast the trend to 2020. METHODS Through a systematic literature review and meta-analysis, we estimated prevalence of blindness (presenting visual acuity <3/60 in the better eye), moderate-to-severe vision impairment (MSVI; 3/60≤presenting visual acuity <6/18), mild vision impairment (mild VI: 6/18≤presenting visual acuity <6/12) and uncorrected presbyopia for 1990, 2010, 2015 and 2020. A total of 44 population-based studies were included. RESULTS In 2015, age-standardised prevalence of blindness, MSVI, mild VI and uncorrected presbyopia was 0.37% (80% uncertainty interval (UI) 0.12%-0.68%), 3.06% (80% UI 1.35%-5.16%) and 2.65% (80% UI 0.92%-4.91%), 32.91% (80% UI 18.72%-48.47%), respectively, in East Asia. Cataract was the leading cause of blindness (43.6%), followed by uncorrected refractive error (12.9%), glaucoma, age-related macular degeneration, corneal diseases, trachoma and diabetic retinopathy (DR). The leading cause for MSVI was uncorrected refractive error, followed by cataract, age-related macular degeneration, glaucoma, corneal disease, trachoma and DR. The burden of VI due to uncorrected refractive error, cataracts, glaucoma and DR has continued to rise over the decades reported. CONCLUSIONS Addressing the public healthcare barriers for cataract and uncorrected refractive error can help eliminate almost 57% of all blindness cases in this region. Therefore, public healthcare efforts should be focused on effective screening and effective patient education, with access to high-quality healthcare.
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Affiliation(s)
- Ching-Yu Cheng
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore.,Ophthalmology & Visual Sciences Academic Clinical Program (Eye ACP), Duke-NUS Medical School, Singapore
| | - Ningli Wang
- Beijing Tongren Eye Center, Beijing Tongren Hospital, Capital Medical University, Beijing Ophthalmology & Visual Science Key Lab, Beijing, China.,Beijing Institute of Ophthalmology, Capital Medical University, Beijing, China
| | - Tien Y Wong
- Singapore Eye Research Institute, Singapore National Eye Centre, Singapore.,Ophthalmology & Visual Sciences Academic Clinical Program (Eye ACP), Duke-NUS Medical School, Singapore
| | - Nathan Congdon
- Preventive Ophthalmology, Zhongshan Ophthalmic Center, Guangdong, China.,Centre for Public Health, Queen's University Belfast School of Medicine Dentistry and Biomedical Sciences, Belfast, UK
| | - Mingguang He
- Ophthalmology Eye and Ear Hospital, University of Melbourne, Melbourne, Victoria, Australia
| | - Ya Xing Wang
- Beijing Institute of Ophthalmology, Beijing Tongren Hospital, Capital University of Medical Science, Beijing, China
| | - Tasanee Braithwaite
- School of Medicine, Vision and Eye Research Unit (VERU), Anglia Ruskin University, Chelmsford, UK.,Moorfields Eye Hospital NHS Foundation Trust, London, UK
| | - Robert J Casson
- Ophthalmology, Royal Adelaide Hospital, Adelaide, South Australia, Australia
| | | | - Aditi Das
- Ophthalmic Public Health, Leeds Teaching Hospital NHS Trust, London, UK
| | - Seth R Flaxman
- Department of Mathematics and Data Science Institute, Imperial College, London, UK
| | - Jost B Jonas
- Department of Ophthalmology, Ruprecht-Karls-University Heidelberg, Seegartenklinik Heidelberg, Mannheim, Germany
| | | | - John H Kempen
- Ophthalmology and Epidemiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | - Janet Leasher
- HPD/College of Optometry, Nova Southeastern University, Davie, Florida, USA
| | - Hans Limburg
- Health Information Services, Grootebroek, The Netherlands
| | - Kovin Naidoo
- African Vision Research Institute, Durban, South Africa
| | | | - Serge Resnikoff
- Brien Holden Vision Institute, Sydney, New South Wales, Australia
| | | | - Nina Tahhan
- Brien Holden Vision Institute, Sydney, New South Wales, Australia
| | - Hugh R Taylor
- Melbourne School of Population Health, The University of Melbourne, Carlton, Victoria, Australia
| | - Rupert R A Bourne
- School of Medicine, Vision and Eye Research Unit (VERU), Anglia Ruskin University, Chelmsford, UK
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Guo J, Wu C, Zhang J, Jiang S, Lv S, Lu D, Qi X, Feng C, Liang W, Chang X, Zhang Y, Xu H, Cao Y, Wang G, Zhou Z. Anthropometric measures at age 3 years in associations with prenatal and postnatal exposures to chlorophenols. CHEMOSPHERE 2019; 228:204-211. [PMID: 31029966 DOI: 10.1016/j.chemosphere.2019.04.127] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Revised: 04/12/2019] [Accepted: 04/16/2019] [Indexed: 06/09/2023]
Abstract
BACKGROUND Chlorophenols (CPs), suspected as endocrine disrupting chemicals, exposure during early life may contribute to body size. However, limited human data with inconsistent findings have examined the developmental effects of CPs exposure. OBJECTIVE To explore associations between prenatal and postnatal CPs exposure and anthropometric parameters in children aged 3 years. METHODS A subset of 377 mother-child pairs with urinary five CP concentrations were enrolled from a prospective birth cohort. Generalized linear models were conducted to evaluate associations of CPs exposure with children's anthropometric measures. RESULTS Maternal urinary 2,4,6-trichlorophenol (2,4,6-TCP) concentrations were significantly negatively associated with weight z scores [regression coefficient (β) = -0.51, 95% confidence interval (CI): -0.96, -0.05; p = 0.01], weight for height z scores (β = -0.54, 95% CI: -1.02, -0.06; p = 0.01) and body mass index (BMI) z scores (β = -0.53, 95% CI: -1.03, -0.03; p = 0.01) of children aged 3 years, after adjustment for potential confounders and postnatal CPs exposure. In the sex-stratified analyses, these inverse associations remained among boys, while in girls, positive associations of prenatal 2,4,6-TCP exposure with weight for height z scores and BMI z scores were observed. Postnatal exposure to 2,5-diclorophenol (2,5-DCP) was positively associated with weight z scores (β = 0.26, 95% CI: 0.02, 0.50; p = 0.04), after controlling for possible confounders and maternal CPs exposure during pregnancy. Considering potential sex-specific effects, these associations were only observed in girls. CONCLUSIONS Our findings indicate that prenatal 2,4,6-TCP exposure and postnatal 2,5-DCP exposure may have adverse and sex-specific effects on children's physical development.
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Affiliation(s)
- Jianqiu Guo
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China
| | - Chunhua Wu
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China.
| | - Jiming Zhang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China
| | - Shuai Jiang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China
| | - Shenliang Lv
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China
| | - Dasheng Lu
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai, 200336, China
| | - Xiaojuan Qi
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China; Zhejiang Provincial Center for Disease Control and Prevention, No. 3399 Binsheng Road, Hangzhou, 310051, China
| | - Chao Feng
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai, 200336, China
| | - Weijiu Liang
- Changning District Center for Disease Control and Prevention, No. 39 Yunwushan Road, Shanghai, 200051, China
| | - Xiuli Chang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China
| | - Yubin Zhang
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China
| | - Hao Xu
- Changning District Center for Disease Control and Prevention, No. 39 Yunwushan Road, Shanghai, 200051, China
| | - Yang Cao
- Unit of Biostatistics, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, 17177, Sweden; Clinical Epidemiology and Biostatistics, School of Medical Sciences, Örebro University, Örebro, 70182, Sweden
| | - Guoquan Wang
- Shanghai Municipal Center for Disease Control and Prevention, No. 1380 Zhongshan West Road, Shanghai, 200336, China
| | - Zhijun Zhou
- School of Public Health/Key Laboratory of Public Health Safety of Ministry of Education/Key Lab of Health Technology Assessment, National Health Commission of the People's Republic of China, Fudan University, No. 130 Dong'an Road, Shanghai, 200032, China.
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A multiplex PCR for the identification of Echinococcus multilocularis, E. granulosus sensu stricto and E. canadensis that infect human. Parasitology 2019; 146:1595-1601. [DOI: 10.1017/s0031182019000921] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
AbstractEchinococcus granulosus sensu stricto (s.s.), Echinococcus multilocularis and Echinococcus canadensis are the common causes of human echinococcosis in China. An accurate species identification tool for human echinococcosis is needed as the treatments and prognosis are different among species. The present work demonstrates a method for the simultaneous detection of these three Echinococcus species based on multiplex polymerase chain reaction (mPCR). Specific primers of this mPCR were designed based on the mitochondrial genes and determined by extensive tests. The method can successfully detect either separated or mixed target species, and generate expected amplicons of distinct size for each species. Sensitivity of the method was tested by serially diluted DNA, showing a detection threshold as less as 0.32 pg for both E. granulosus s.s. and E. canadensis, and 1.6 pg for E. multilocularis. Specificity assessed against 18 other parasites was found to be 100% except weakly cross-react with E. shiquicus. The assay was additionally applied to 69 echinococcosis patients and 38 healthy persons, confirming the high reliability of the method. Thus, the mPCR described here has high application potential for clinical identification purposes, and can further provide a useful tool for evaluation of serology and imaging method.
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Dai Y, Xu X, Liu J, Jin X, Shen M, Wang X, Cao J, Yang H. Prevalence of intestinal helminth infections in Jiangsu Province, eastern China; a cross-sectional survey conducted in 2015. BMC Infect Dis 2019; 19:604. [PMID: 31291911 PMCID: PMC6617619 DOI: 10.1186/s12879-019-4264-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Accepted: 07/04/2019] [Indexed: 11/25/2022] Open
Abstract
Background Intestinal helminth infections are a serious public health problem in developing countries. Jiangsu, an eastern coastal province of China, has an environment conducive to the transmission of intestinal parasites, and suffered human infection rates of 71.75% in 1990. Due to comprehensive anti-transmission measures undertaken throughout the province in the 1990s, the prevalence had decreased to 9.28% in 2002. In order to assess the current epidemic situation for intestinal parasitic infections in Jiangsu province, a province-wide cross-sectional survey was carried out in 2015. Methods Surveys were conducted in two main settings; rural (for soil-transmitted parasites) and urban (for Clonorchis sinensis), selected through stratified random sampling. Human infection rates were evaluated through the detection of helminth eggs or cysts (oocysts or trophozoites) of intestinal protozoa in fecal samples by microscopy. Secondary intermediate and reservoir hosts were surveyed for C. sinensis infection. Questionnaires were completed by each participant to evaluate knowledge, attitude and practice of soil-transmitted parasite and C. sinensis avoidance. Results 115 out of 30153 participants (0.38%) had intestinal helminths or protozoa. There were eight species of helminth detected and the most common parasite was the hookworm Ancylostoma duodenale. In rural settings, there were significant differences in infection rates between participants of differing economic status. In urban settings, only four cases of C. sinensis infection were detected. However, secondary intermediate and reservoir hosts were found to harbor parasites. The questionnaire survey revealed that 38.42% participants were not aware of how humans become infected by hookworms. Knowledge and awareness of C. sinensis was similarly low, with 53.22% participants combining the use of chopping boards for raw and cooked food items when preparing meals. Conclusions The prevalence of intestinal parasitic infections in Jiangsu Province in eastern China has decreased from 71.57% in 1990 to 0.38% in 2015. Control measures should now focus on parasitic infections in the elderly and in children, health promotion and the development of alternative detection methods. Electronic supplementary material The online version of this article (10.1186/s12879-019-4264-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Yang Dai
- National Health Commission (NHC) Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Meiyuan 117, Wuxi City, Jiangsu Province, People's Republic of China.,Public Health Research Center, Jiangnan University, Wuxi, People's Republic of China
| | - Xiangzhen Xu
- National Health Commission (NHC) Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Meiyuan 117, Wuxi City, Jiangsu Province, People's Republic of China
| | - Jianfeng Liu
- National Health Commission (NHC) Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Meiyuan 117, Wuxi City, Jiangsu Province, People's Republic of China
| | - Xiaolin Jin
- National Health Commission (NHC) Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Meiyuan 117, Wuxi City, Jiangsu Province, People's Republic of China
| | - Mingxue Shen
- National Health Commission (NHC) Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Meiyuan 117, Wuxi City, Jiangsu Province, People's Republic of China
| | - Xiaoting Wang
- National Health Commission (NHC) Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Meiyuan 117, Wuxi City, Jiangsu Province, People's Republic of China.,Public Health Research Center, Jiangnan University, Wuxi, People's Republic of China
| | - Jun Cao
- National Health Commission (NHC) Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Meiyuan 117, Wuxi City, Jiangsu Province, People's Republic of China. .,Public Health Research Center, Jiangnan University, Wuxi, People's Republic of China. .,Center for Global Health, Nanjing Medical University, Nanjing, People's Republic of China.
| | - Haitao Yang
- National Health Commission (NHC) Key Laboratory of Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Meiyuan 117, Wuxi City, Jiangsu Province, People's Republic of China. .,Public Health Research Center, Jiangnan University, Wuxi, People's Republic of China. .,Center for Global Health, Nanjing Medical University, Nanjing, People's Republic of China.
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Yang X, Zeng X, Wang W. Recurrent massive ascites three months after liver autotransplantation. IDCases 2019; 17:e00583. [PMID: 31338299 PMCID: PMC6624448 DOI: 10.1016/j.idcr.2019.e00583] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Revised: 06/26/2019] [Accepted: 06/26/2019] [Indexed: 02/05/2023] Open
Affiliation(s)
- Xianwei Yang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, PR China
| | - Xintao Zeng
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, PR China.,Department of Hepatobiliary and Pancreatic Surgery, Mianyang Central Hospital, PR China
| | - Wentao Wang
- Department of Liver Surgery and Liver Transplantation Center, West China Hospital of Sichuan University, Chengdu, PR China
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Qiu J, Li R, Xiao Y, Xia J, Zhu H, Niu Y, Huang D, Shao Q, Cui Y, Wang Y. Spatiotemporal Heterogeneity in Human Schistosoma japonicum Infection at Village Level in Hubei Province, China. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:E2198. [PMID: 31234380 PMCID: PMC6617067 DOI: 10.3390/ijerph16122198] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/29/2019] [Revised: 06/19/2019] [Accepted: 06/20/2019] [Indexed: 11/16/2022]
Abstract
The spatiotemporal dynamics of Schistosoma japonicum, combined with temporal heterogeneity among regions of different epidemic areal-types from a microscale viewpoint might capture the local change dynamics and thus aid in optimizing the combinations of precise schistosomiasis control measures. The prevalence data on schistosomiasis infection from 2007 to 2012 in the 30 most endemic counties of Hubei Province, Central China, were appended to the village-level administrative division polygon layer. Anselin local Moran's I, a retrospective space-time scan statistic and a multilevel-growth model analysis framework, was used to investigate the spatiotemporal pattern of schistosomiasis resident infection rate (RIR) at the village level and how natural geographical environment influence the schistosomiasis RIR over time. Two spatiotemporal high-risk clusters and continuous high-rate clusters were identified mainly in the embankment region across flooding areas of lakes connected with the Yangze and Hanjiang Rivers. Moreover, 12 other clusters and outlier evolution modes were detected to be scattered across the continuous high-rate clusters. Villages located in embankment region had the highest initial values and most rapidly reduced RIRs over time, followed by villages located in marshland-and-lake regions and finally by villages located in hilly region. Moreover, initial RIR values and rates of change did significantly vary (p < 0.001 and p < 0.001, respectively) irrespective of their epidemic areal-type. These local spatiotemporal heterogeneities could contribute to the formulation of distinct control strategies based on local transmission dynamics and be applied in other endemic areas of schistosomiasis.
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Affiliation(s)
- Juan Qiu
- Key Laboratory of Monitoring and Estimate for Environment and Disaster of Hubei Province, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China.
| | - Rendong Li
- Key Laboratory of Monitoring and Estimate for Environment and Disaster of Hubei Province, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China.
| | - Ying Xiao
- Hubei Center for Disease Control and Prevention, Hubei Provincial Academy of Preventive Medicine, Wuhan 430079, China.
| | - Jing Xia
- Hubei Center for Disease Control and Prevention, Hubei Provincial Academy of Preventive Medicine, Wuhan 430079, China.
| | - Hong Zhu
- Hubei Center for Disease Control and Prevention, Hubei Provincial Academy of Preventive Medicine, Wuhan 430079, China.
| | - Yingnan Niu
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
- State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
| | - Duan Huang
- Key Laboratory of Monitoring and Estimate for Environment and Disaster of Hubei Province, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China.
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Qihui Shao
- Key Laboratory of Monitoring and Estimate for Environment and Disaster of Hubei Province, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China.
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Ying Cui
- Key Laboratory of Monitoring and Estimate for Environment and Disaster of Hubei Province, Institute of Geodesy and Geophysics, Chinese Academy of Sciences, Wuhan 430077, China.
- College of Earth and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China.
| | - Yong Wang
- State Key Laboratory of Resources and Environmental Information Systems, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
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Zou Y, Wang F, Wang HB, Wu WW, Fan CK, Zhang HY, Wang L, Tian XJ, Li W, Huang MJ. Disseminated cysticercosis in China with complex and variable clinical manifestations: a case series. BMC Infect Dis 2019; 19:543. [PMID: 31221089 PMCID: PMC6584991 DOI: 10.1186/s12879-019-4171-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Accepted: 06/07/2019] [Indexed: 11/16/2022] Open
Abstract
Background Cysticercosis is an emerging and neglected tropical disease (NTD) that poses a serious public health concern worldwide. Disseminated cysticercosis (DCC) is an uncommon manifestation of cysticercosis, also found in China. Case presentation We report three cases of DCC in patients living in China, with different clinical and radiological presentations. All three patients had DCC with active ocular cysticercosis, including one patient with widespread DCC caused by direct ingestion of Taenia solium eggs. The intravitreal cysticercus cyst in this patient was completely extracted entirely by 23-gauge pars plana vitrectomy, and the cyst was oval in shape on the flat mount preparation. Conclusion The clinical presentation of DCC is highly sophisticated. The diagnosis depended on the typical radiological presentations, biopsy and flat mount preparations of the cyst.
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Affiliation(s)
- Yang Zou
- Beijing Institute of Tropical Medicine, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory for Research on Prevention and Treatment of Tropical Diseases, Beijing, China
| | - Fei Wang
- Beijing Institute of Tropical Medicine, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory for Research on Prevention and Treatment of Tropical Diseases, Beijing, China
| | - Hong-Bin Wang
- Department of Ophthalmology, Beijing Friendship Hospital, Capital Medical University, Beijing, China.
| | - Wayne W Wu
- Department of Ophthalmology, Mayo Clinic Health System, Eau Claire, WI, USA
| | - Chia-Kwung Fan
- Department of Molecular Parasitology and Tropical Diseases School of Medicine College of Medicine, Taipei Medical University, Taipei, Taiwan
| | - Han-Yu Zhang
- Department of Emergency Medicine Beijing Friendship Hospital, Capital Medical University, Beijing, China
| | - Lei Wang
- Beijing Institute of Tropical Medicine, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory for Research on Prevention and Treatment of Tropical Diseases, Beijing, China
| | - Xiao-Jun Tian
- Beijing Institute of Tropical Medicine, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory for Research on Prevention and Treatment of Tropical Diseases, Beijing, China
| | - Wei Li
- Beijing Institute of Tropical Medicine, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory for Research on Prevention and Treatment of Tropical Diseases, Beijing, China
| | - Min-Jun Huang
- Beijing Institute of Tropical Medicine, Beijing Friendship Hospital, Capital Medical University; Beijing Key Laboratory for Research on Prevention and Treatment of Tropical Diseases, Beijing, China
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Fu Y, Huang Y, Abuzeid AMI, Hang J, Yan X, Wang M, Liu Y, Sun Y, Ran R, Zhang P, Li G. Prevalence and potential zoonotic risk of hookworms from stray dogs and cats in Guangdong, China. VETERINARY PARASITOLOGY- REGIONAL STUDIES AND REPORTS 2019; 17:100316. [PMID: 31303229 DOI: 10.1016/j.vprsr.2019.100316] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2019] [Revised: 06/05/2019] [Accepted: 06/17/2019] [Indexed: 11/18/2022]
Abstract
Hookworm infection is globally prevalent among dogs and cats representing a major public health risk. Although previous studies have surveyed canine and feline hookworms in Guangzhou city, the status of these infection needs to be further explored in other regions of South China. To investigate the prevalence and zoonotic risk of canine and feline hookworms in eight cities (Guangzhou, Foshan, Shenzhen, Huizhou, Zhongshan, Shaoguan, Shantou and Chaozhou) of Guangdong province, China, we developed specific PCR methods based on ITS sequence for identifying three common hookworm species. The results showed that the prevalence of hookworms from stray dogs and cats was 20.23% (142/702) and 15.26% (47/308), respectively. The established PCR methods could identify Ancylostoma ceylanicum, A. caninum and A. tubaeforme. The mixed infections of A. caninum and A. ceylanicum were detected in stray dogs of Guangzhou and Shaoguan, with the rate of 8.3% and 21.2%, respectively. Among the stray dogs in Foshan, the infection rate of A. ceylanicum was higher than that of A. caninum. The stray cats in four of five investigated cities were infected with A. ceylanicum. The different region, age and rearing environments had an impact on the hookworm infection rates of stray dogs and cats. In conclusion, the reported higher infection rate of A. ceylanicum than other hookworm species in stray dogs and cats poses a potential risk to public health.
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Affiliation(s)
- Yeqi Fu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Yue Huang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Asmaa M I Abuzeid
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Jianxiong Hang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Xinxin Yan
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Mingwei Wang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Yunqiu Liu
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Yongxiang Sun
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Rongkun Ran
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Pan Zhang
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China
| | - Guoqing Li
- College of Veterinary Medicine, South China Agricultural University, Guangzhou 510542, China.
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Qiu C, Zou HY, Deng Y, Liang YS, Lu DB. A meta-analysis of infection rates of Schistosoma japonicum in sentinel mice associated with infectious waters in mainland China over last 40 years. PLoS Negl Trop Dis 2019; 13:e0007475. [PMID: 31173590 PMCID: PMC6584001 DOI: 10.1371/journal.pntd.0007475] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2019] [Revised: 06/19/2019] [Accepted: 05/20/2019] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Schistosomiasis japonica is a zoonotic parasitic disease. After nearly 70 years of control efforts in China, Schistosomiasis transmission has been reduced to a much lower level. The absence or near absence of infections in humans or livestock, based on traditional fecal and serological tests, has made the targets and priorities of future control efforts difficult to determine. However, detection of schistosome cercariae in waters using sentinel mice could be an alternative way of identifying remaining foci of infection, or even serve as a tool for evaluation of control efficacy. This method has been employed in China over last forty years. We therefore performed a meta-analysis of the relevant research to investigate if infections in sentinel mice mirror the ongoing trend of schistosomiasis transmission in China. METHODS We conducted a meta-analysis of studies reporting infection rates of S. japonicum in sentinel mice in China before Sep 1, 2018 in accordance with the PRISMA guidelines. We retrieved all relative studies based on five databases (CNKI, WanFang, VIP, PubMed and Web of Science) and the reference lists of resulting articles. For each individual study, the infection rate in sentinel mice is presented together with its 95% confidence interval (CI). Point estimates of the overall infection rates and their 95% CIs were calculated. Subgroup analyses were performed according to study periods, seasons or regions. RESULTS We identified 90 articles, including 290 studies covering eight endemic provinces. The overall rate in sentinel mice was 12.31% (95% CI: 10.14-14.65%) from 1980 to 2018. The value of 3.66% (95% CI: 2.62-4.85%) estimated in 2004 to 2018 was significantly lower than in 1980 to 2003 (22.96%, 95% CI: 19.25-26.89%). The estimate was significantly higher in the middle and lower reaches than in the upper reaches of the Yangtze River. The highest estimates were obtained in Hunan (30.11%, 95% CI: 25.64-34.77%) followed by Anhui (26.34%, 95% CI: 12.88-42.44%) and then Jiangxi (13.73%, 95% CI: 6.71-22.56%). Unlike the other provinces in the middle and lower reaches, no significant reduction was seen in Hubei after 2003. Even in Hubei two studies carried out after 2014 reported infections in sentinel mice, although no infected snails were reported across the province. Infections were most found in April (17.40%, 95% CI: 1.13-45.49%), July (24.98%, 95% CI: 15.64-35.62%) and October (17.08%, 95% CI 5.94-32.05%). High degrees of heterogeneity were observed. CONCLUSION This meta-analysis provides a comprehensive analysis of schistosome infection in sentinel mice across China. The estimates largely mirror the ongoing trends of transmission in terms of periods and regions. Infections were most likely to occur in April, July and October. In areas where no infected snails were reported infections in sentinel mice were still observed. Due to the presence of snails and infected wildlife, detection of schistosomes in waters using such a highly sensitive method as the deployment of sentinel mice, remains of importance in schistosomiasis monitoring. We would suggest the current criteria for transmission interruption or elimination of schistosomiasis in China be adjusted by integrating the results of sentinel mice based surveys.
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Affiliation(s)
- Chen Qiu
- Department of Epidemiology and Statistics, School of Public Health, Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, School of Public Health, Soochow University, Suzhou, China
- Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Wuxi, Jiangsu Province, China
| | - Hui-Ying Zou
- Department of Epidemiology and Statistics, School of Public Health, Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, School of Public Health, Soochow University, Suzhou, China
- Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Wuxi, Jiangsu Province, China
| | - Yao Deng
- Department of Epidemiology and Statistics, School of Public Health, Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, School of Public Health, Soochow University, Suzhou, China
- Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Wuxi, Jiangsu Province, China
| | - You-sheng Liang
- Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Wuxi, Jiangsu Province, China
- Jiangsu Provincial Key Laboratory on Parasites and Vector Control Technology, Wuxi, China
- Jiangsu Institute of Parasitic Diseases, Wuxi, China
| | - Da-Bing Lu
- Department of Epidemiology and Statistics, School of Public Health, Soochow University, Suzhou, China
- Jiangsu Key Laboratory of Preventive and Translational Medicine for Geriatric Diseases, School of Public Health, Soochow University, Suzhou, China
- Key Laboratory of National Health and Family Planning Commission on Parasitic Disease Control and Prevention, Jiangsu Provincial Key Laboratory on Parasite and Vector Control Technology, Jiangsu Institute of Parasitic Diseases, Wuxi, Jiangsu Province, China
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Qian MB, Zhou CH, Zhu HH, Zhu TJ, Huang JL, Chen YD, Zhou XN. Assessment of health education products aimed at controlling and preventing helminthiases in China. Infect Dis Poverty 2019; 8:22. [PMID: 30909961 PMCID: PMC6434872 DOI: 10.1186/s40249-019-0531-y] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2018] [Accepted: 03/07/2019] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Helminthiases have placed a huge burden of disease on the population in China. However, widespread control activities have led to significant achievements. As health education has been widely disseminated and plays an important role in the control and elimination of these diseases, we collected health education products aimed at controlling and preventing helminthiases in China. We analyzed their characteristics and assessed their quality. METHODS Firstly, health education products aimed at controlling and preventing helminthiases were collected from a diverse range of organizations. Secondly, the expert brainstorming and Delphi methods were applied to establish an evaluation system, which was then used to assess the collected products systematically. Those deemed excellent were awarded. Characteristics - including type, source, targeted disease(s), targeted population, and languages - of the collected products and the awarded products were presented here. RESULTS In total, 96 health education products on helminthiases were collected from 53 organizations. Most products belonged to either the graphic design (47) or daily-use (24) category. Seventy were collected from Centers for Disease Control and Prevention and 20 from institutes or control stations of parasitic diseases, primarily at the provincial and county levels. Regarding disease targets of the products, 67 focused on a single helminthiasis, 25 on multiple helminthiases, and the remaining four on non-specific diseases. Of the 67 single helminthiasis-focused products, most targeted schistosomiasis (37), followed by echinococcosis (16). The majority of products (79) targeted the general population, while 11 targeted students specifically. Regarding languages, 86 products were only in Chinese, while the other ten were in both Chinese and the minority languages of China. Out of these ten products, one targeted schistosomiasis and the other nine targeted echinococcosis. Thirty-four products were awarded. The characteristics of the awarded products were similar to those of the collected products. CONCLUSIONS A diverse range of health education products have been designed and applied for the prevention and control of helminthiases in China. Many products have good features such as specifying the targeted diseases and populations. However, there are significant gaps in terms of both the quantity and quality of products pertaining to some of the diseases. Experiences from the awarded products could be drawn upon to design more products aimed at a range of different helminthiases.
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Affiliation(s)
- Men-Bao Qian
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, China.,Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, China.,World Health Organization Collaborating Center for Tropical Diseases, Shanghai, 200025, China
| | - Chang-Hai Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, China.,Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, China.,World Health Organization Collaborating Center for Tropical Diseases, Shanghai, 200025, China
| | - Hui-Hui Zhu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, China.,Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, China.,World Health Organization Collaborating Center for Tropical Diseases, Shanghai, 200025, China
| | - Ting-Jun Zhu
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, China.,Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, China.,World Health Organization Collaborating Center for Tropical Diseases, Shanghai, 200025, China
| | - Ji-Lei Huang
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, China.,Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, China.,World Health Organization Collaborating Center for Tropical Diseases, Shanghai, 200025, China
| | - Ying-Dan Chen
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, China.,Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China.,National Center for International Research on Tropical Diseases, Shanghai, 200025, China.,World Health Organization Collaborating Center for Tropical Diseases, Shanghai, 200025, China
| | - Xiao-Nong Zhou
- National Institute of Parasitic Diseases, Chinese Center for Disease Control and Prevention, Shanghai, 200025, China. .,Key Laboratory of Parasite and Vector Biology, Ministry of Health, Shanghai, 200025, China. .,National Center for International Research on Tropical Diseases, Shanghai, 200025, China. .,World Health Organization Collaborating Center for Tropical Diseases, Shanghai, 200025, China.
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Chen CH, Lin CL, Hsu CY, Kao CH. A retrospective administrative database analysis of the association between clonorchiasis or helminthiasis and the development of cholelithiasis. Curr Med Res Opin 2019; 35:489-496. [PMID: 30071748 DOI: 10.1080/03007995.2018.1508011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
PURPOSE Parasite infestation (PI) is reportedly related to intrahepatic stones (IHSs) and common bile duct (CBD) stones. This study assessed the association of clonorchiasis and helminthiasis with the sub-types of cholelithiasis. METHODS The study cohort consisted of 713 patients who were aged ≥20 years with clonorchiasis or helminthiasis for the first time between 2000 and 2010 from the National Health Insurance Research Database. The controls without clonorchiasis and helminthiasis were randomly selected with a 1:1 propensity score matching. All patients were followed up until the end of 2011 to measure the incidence of cholelithiasis. RESULTS The risks of cholelithiasis in the clonorchiasis (adjusted hazard ratio [aHR] = 3.72, 95% confidence interval [CI] = 2.01-6.90) and helminthiasis (aHR = 2.27, 95% CI = 1.25-4.16) were higher than in the non-PI cohort. Patients with clonorchiasis had increased risks of gallstones without bile duct stones (aHR = 3.13, 95% CI = 1.54-6.39) and bile duct stones without gallstones (aHR = 4.75, 95% CI = 1.23-18.4). Patients with helminthiasis had an increased risk of gallstones without bile duct stones (aHR = 2.20, 95% CI = 1.11-4.33), but no higher risk of bile duct stones without gallstones was observed in helminthiasis (aHR = 2.22, 95% CI = 0.54-9.06), despite its high aHR. Neither clonorchiasis nor helminthiasis had an increased risk of concomitant gallstones and bile duct stones. CONCLUSION Clonorchiasis is related to the development of not only gallstones, but also bile duct stones, and helminthiasis is only associated with the development of gallstones. However, cases of PI are rare in Taiwan, and this requires more international studies to clarify the association between helminthiasis and bile duct stones.
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Affiliation(s)
- Chien-Hua Chen
- a Digestive Disease Center , Show-Chwan Memorial Hospital , Changhua , Taiwan
- b Digestive Disease Center , Changbing Show-Chwan Memorial Hospital , Lukang , Taiwan
- c Department of Food Science and Technology , Hungkuang University , Taichung , Taiwan
- d Chung Chou University of Science and Technology , Yuanlin Township, Changhua County , Taiwan
| | - Cheng-Li Lin
- e Management Office for Health Data , China Medical University Hospital , Taichung , Taiwan
- f College of Medicine , China Medical University , Taichung , Taiwan
| | - Chung Y Hsu
- g Graduate Institute of Biomedical Sciences , China Medical University , Taichung , Taiwan
| | - Chia-Hung Kao
- h Graduate Institute of Biomedical Sciences, School of Medicine, College of Medicine , China Medical University , Taichung , Taiwan
- i Department of Nuclear Medicine and PET Center , China Medical University Hospital , Taichung , Taiwan
- j Department of Bioinformatics and Medical Engineering , Asia University , Taichung , Taiwan
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Wang L, Zou Y, Zhu X, Bottazzi ME, Hotez PJ, Zhan B. China's shifting neglected parasitic infections in an era of economic reform, urbanization, disease control, and the Belt and Road Initiative. PLoS Negl Trop Dis 2019; 13:e0006946. [PMID: 30677027 PMCID: PMC6345419 DOI: 10.1371/journal.pntd.0006946] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022] Open
Affiliation(s)
- Lei Wang
- Beijing Institute of Tropical Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, PR China
- Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America
- Beijing Key Laboratory for Prevention and Treatment of Tropical Diseases, Beijing, PR China
| | - Yang Zou
- Beijing Institute of Tropical Medicine, Beijing Friendship Hospital, Capital Medical University, Beijing, PR China
- Beijing Key Laboratory for Prevention and Treatment of Tropical Diseases, Beijing, PR China
| | - Xinping Zhu
- Department of Medical Microbiology and Parasitology, School of Basic Medical Sciences, Capital Medical University, Beijing, PR China
| | - Maria Elena Bottazzi
- Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Biology, Baylor University, Waco, Texas, United States of America
| | - Peter J. Hotez
- Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America
- Department of Biology, Baylor University, Waco, Texas, United States of America
| | - Bin Zhan
- Departments of Pediatrics and Molecular Virology and Microbiology, National School of Tropical Medicine, Baylor College of Medicine, Houston, Texas, United States of America
- * E-mail:
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Elimination of Schistosoma japonicum Transmission in China: A Case of Schistosomiasis Control in the Severe Epidemic Area of Anhui Province. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2019; 16:ijerph16010138. [PMID: 30621070 PMCID: PMC6339220 DOI: 10.3390/ijerph16010138] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2018] [Revised: 12/30/2018] [Accepted: 01/02/2019] [Indexed: 12/18/2022]
Abstract
Over the several decades, China has been incessantly optimizing control strategies in response to the varying epidemic situations of schistosomiasis. We evaluated continuously the changing prevalence under different control strategies of two villages, Sanlian and Guifan, in China through five phases lasting 37 years. We tested residents, calculated prevalence and discussed change causes. We found the prevalence in Sanlian did not differ significant from that of Guifan (p = 0.18) in 1981, but decreased to 2.66%, much lower than Guifan’s 11.25%, in 1984 (p = 0). Besides, prevalence in Guifan increased to 21.25% in 1987, while in Sanlian it rose to 20.78% until 1989. Those data confirmed that praziquantel combined with snail control could better reduce the prevalence. From 1992 to 1994, the prevalence in the two villages displayed downtrends, which showed the World Bank Loan Project worked. From 1995 to 2004, repeated oscillations with no obvious change trend was seen. Since 2005, the prevalence in both villages has shown a significant downtrend (p < 0.05), which suggests the integrated strategy is effective. We considered the control strategies were implemented suitably in the study area under changing social circumstances. Adjusting the strategy in consideration of social transformations is necessary and vital. The experience may be useful for policy making of other epidemic areas with an analogous situation.
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Liu G, Li Y, Cui Y, Huang B, Wang H, Chen Y, Kou J, Wang F, Zhang C, Huang Y, Li Y, Wang M, Wei Q, Li J, Sun H, Yin K, Zhao G, Jiang Y, Mao X, Yu Z, Liu X. Cysticercosis in Shandong Province, Eastern China. Emerg Infect Dis 2019; 24:384-385. [PMID: 29350149 PMCID: PMC5782879 DOI: 10.3201/eid2402.151253] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
We analyzed demographic and clinical data and estimated the incidence of cysticercosis in Shandong Province, China, during 1975–2014. Our analyses showed that a cysticercosis-endemic area is present in Shandong Province, especially in its western regions. Improved surveillance and control are needed to address the elevated risk for cysticercosis in this region.
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Abstract
Paragonimiasis is a zoonotic disease caused by lung flukes of the genus Paragonimus. Humans usually become infected by eating freshwater crabs or crayfish containing encysted metacercariae of these worms. However, an alternative route of infection exists: ingestion of raw meat from a mammalian paratenic host. Adult worms normally occur in pairs in cysts in the lungs from which they void their eggs via air passages. The pulmonary form is typical in cases of human infection due to P. westermani, P. heterotremus, and a few other species (Table 5.1). Worms may occupy other sites in the body, notably the brain, but lung flukes have made their presence felt in almost every organ. Ectopic paragonimiasis is particularly common when infection is due to members of the P. skrjabini complex (Table 5.1). Human paragonimiasis occurs primarily in the tropics and subtropics of Asia, Africa, and the Americas, with different species being responsible in different areas (Table 5.1).
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Affiliation(s)
- David Blair
- College of Science and Engineering, James Cook University, Townsville, QLD, Australia.
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Vascular infiltration-based surgical planning in treating end-stage hepatic alveolar echinococcosis with ex vivo liver resection and autotransplantation. Surgery 2018; 165:889-896. [PMID: 30591376 DOI: 10.1016/j.surg.2018.11.007] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/30/2018] [Accepted: 11/16/2018] [Indexed: 02/08/2023]
Abstract
BACKGROUND For end-stage hepatic alveolar echinococcosis, insufficient guidance is available regarding surgical treatment, especially for ex vivo liver resection combined with autotransplantation. The indications for this complex surgery require further discussion. METHOD We reviewed 50 cases of patients who underwent ex vivo liver resection combined with autotransplantation from January 2014 to February 2018. A newly developed classification was used to describe vascular infiltration in all patients, who were divided into four groups based on anatomic lesion features and surgical patterns. The surgical planning for ex vivo liver resection combined with autotransplantation is then thoroughly discussed according to the gathered information. RESULTS In all patients, the length of the operation and the anhepatic phase were 735 minutes (range, 540-1,170 minutes) and 309 minutes (range, 122-480 minutes), respectively. The median remnant liver volume-to-standard liver volume ratio was 0.58 (range, 0.32-1.11). The rate of complications classified as Clavien-Dindo grade III or higher was 22% (11/50). A total of 3 postoperative deaths occurred. We identified 4 types with distinguished lesion anatomic features. Type I patients required more frequent unconventional reconstruction of the portal vein and bile duct than the other patients. Of the 6 type IV patients, 4 required modification of the surgical protocol according to intraoperative findings. CONCLUSION Vascular infiltration-based classification could improve the anatomic comprehension and, thus, facilitate surgical planning for ex vivo liver resection combined with autotransplantation. Through cautious evaluation of operability, liver function, and residual liver volume, together with delicate operative techniques and careful postoperative management, ex vivo liver resection combined with autotransplantation can achieve good results in the treatment of end-stage hepatic alveolar echinococcosis.
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Wang H, Li J, Zhang C, Guo B, Wei Q, Li L, Yang N, Peter McManus D, Gao X, Zhang W, Wen H. Echinococcus granulosus sensu stricto: silencing of thioredoxin peroxidase impairs the differentiation of protoscoleces into metacestodes. ACTA ACUST UNITED AC 2018; 25:57. [PMID: 30474598 PMCID: PMC6254101 DOI: 10.1051/parasite/2018055] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Accepted: 10/29/2018] [Indexed: 01/14/2023]
Abstract
Cystic echinococcosis (CE) is a cosmopolitan parasitic disease caused by infection with the larval stage of Echinococcus granulosus sensu lato. Thioredoxin peroxidase (TPx) may play an essential role in the antioxidant defence system of E. granulosus s.l. as neither catalase nor glutathione peroxidase activities have been detected in the parasite. However, it is not known whether TPx affects the survival and growth of E. granulosus s.l. during development. In this study, three fragments of siRNA specific for EgTPx (siRNA-1/2/3) were designed and transfected into protoscoleces of E. granulosus sensu stricto by electroporation. Quantitative real-time PCR and Western blotting analysis showed that siRNA-3 significantly reduced the expression of EgTPx. Coincidentally, knockdown of EgTPx expression in protoscoleces with siRNA-3 significantly reduced the viability of the parasite under oxidative stress induced by 0.6 mM H2O2. In vitro culture studies showed that protoscoleces treated with siRNA-3 reduced pre-microcyst formation. In vivo experiments showed that injecting mice intraperitoneally with protoscoleces treated with siRNA-3 resulted in a significant reduction in the number, size and weight of CE cysts compared with those of control animals. Silencing of EgTPx led to the impairment of growth of E. granulosus s.s. both in vitro and in vivo, indicating that EgTPx is an important factor for protoscoleces survival and plays an important role in the antioxidant defence against the host during development.
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Affiliation(s)
- Hui Wang
- Branch of The First Affiliated Hospital of Xinjiang Medical University, Changji, Xinjiang 831100, PR China - State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China
| | - Jun Li
- State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China
| | - Chuanshan Zhang
- State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China
| | - Baoping Guo
- State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China
| | - Qin Wei
- State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China
| | - Liang Li
- State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China
| | - Ning Yang
- State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China
| | - Donald Peter McManus
- Molecular Parasitology Laboratory, Infectious Diseases Division, QIMR Berghofer Medical Research Institute, Brisbane, Queensland 4006, Australia
| | - Xiaoli Gao
- Pharmacy College of Xinjiang Medical University, Urumqi 830011, PR China
| | - Wenbao Zhang
- State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China
| | - Hao Wen
- State Key Laboratory of Pathogenesis, Prevention, Treatment of High Incidence Diseases in Central Asia, Clinical Medicine Institute, The First Affiliated Hospital of Xinjiang Medical University, Urumqi, Xinjiang 830054, PR China - Branch of The First Affiliated Hospital of Xinjiang Medical University, Changji, Xinjiang 831100, PR China
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Qian C, Zhang Y, Zhang X, Yuan C, Gao Z, Yuan H, Zhong J. Effectiveness of the new integrated strategy to control the transmission of Schistosoma japonicum in China: a systematic review and meta-analysis. ACTA ACUST UNITED AC 2018; 25:54. [PMID: 30444486 PMCID: PMC6238655 DOI: 10.1051/parasite/2018058] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2018] [Accepted: 11/04/2018] [Indexed: 12/30/2022]
Abstract
Since 2004, the national schistosomiasis control strategy in China has shifted from the morbidity control strategy (conventional strategy) to an integrated strategy (new strategy). We investigated the effectiveness of the new strategy and compared it against the conventional strategy. We retrieved from electronic databases the literature regarding the new strategy published from 2000 to 2017. The effect of the new or conventional strategy on infection by Schistosoma japonicum of humans and snails (Oncomelania hupensis) was evaluated with pooled log relative risk (logRR). A total of only eight eligible publications were included in the final meta-analysis. The results showed that implementation of the new strategy reduced the infection risk by 3–4 times relative to the conventional strategy. More specifically, the conventional strategy caused a reduction in both human (logRR = 0.56, 95% CI: 0.12–0.99) and snail infections (logRR = 0.34, 95% CI: −0.69–1.37), while the new strategy also significantly reduced both human (logRR = 1.89, 95% CI: 1.33–2.46) and snail infections (logRR = 1.61, 95% CI: 1.06–2.15). In contrast to the conventional strategy, the new strategy appeared more effective to control both human (logRR difference = 1.32, 95% CI: 0.78–1.86) and snail infections (logRR difference = 1.53, 95% CI: 0.76–2.31). Our data demonstrate that the new integrated strategy is highly effective to control the transmission of S. japonicum in China, and this strategy is recommended for schistosomiasis elimination in other affected regions across the world, with adaptation to local conditions.
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Affiliation(s)
- Chunyan Qian
- Yuhang Branch, The Second Affiliated Hospital of Zhejiang University, Hangzhou 311100, Zhejiang Province, PR China - School of Life Sciences, Fudan University, Shanghai 200433, PR China
| | - Yuefeng Zhang
- Yuhang Branch, The Second Affiliated Hospital of Zhejiang University, Hangzhou 311100, Zhejiang Province, PR China
| | - Xinyan Zhang
- Department of Clinical Laboratory, The Obstetrics and Gynecology Hospital of Fudan University, Shanghai 200001, PR China
| | - Chao Yuan
- Shanghai Skin Disease Hospital, Shanghai 200443, PR China
| | - Zhichao Gao
- Yuhang Branch, The Second Affiliated Hospital of Zhejiang University, Hangzhou 311100, Zhejiang Province, PR China
| | - Hong Yuan
- Yuhang Branch, The Second Affiliated Hospital of Zhejiang University, Hangzhou 311100, Zhejiang Province, PR China
| | - Jiang Zhong
- School of Life Sciences, Fudan University, Shanghai 200433, PR China
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Yang D, Yang Y, Wang Y, Yang Y, Dong S, Chen Y, Jiang Q, Zhou Y. Prevalence and Risk Factors of Ascaris lumbricoides, Trichuris trichiura and Cryptosporidium Infections in Elementary School Children in Southwestern China: A School-Based Cross-Sectional Study. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:ijerph15091809. [PMID: 30135364 PMCID: PMC6165538 DOI: 10.3390/ijerph15091809] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/27/2018] [Revised: 08/18/2018] [Accepted: 08/20/2018] [Indexed: 11/16/2022]
Abstract
Background: Intestinal parasitic infections pose great public health challenges in school children in developing countries. The aim of this study was to assess the prevalence of A. lumbricoides, T. trichiura and Cryptosporidium among elementary school children in rural southwestern China. Methods: A school-based cross-sectional study involving 321 elementary school children was conducted in 2014 in the southwest of China. They were invited to provide a stool sample and interviewed about the sanitary situation and hygiene behavior. Stool specimens were examined for A. lumbricoides and T. trichiura using the Kato-Katz fecal thick-smear technique. The presence of Cryptosporidium was determined using a modified acid-fast staining method. Results: The prevalence of infection was 10.0% (95% CI: 6.9–13.8%) for A. lumbricoides, 25.2% (95% CI: 20.6–30.4%) for T. trichiura and 2.4% for (95% CI: 1.1–4.9%) Cryptosporidium. The prevalence of co-infection was 3.7% (95% CI: 1.9–6.4%) for A. lumbricoides/T. trichiura, 0.3% (95% CI: 0–1.7%) for A. lumbricoides/Cryptosporidium and 0.9% (95% CI: 0.2–2.7%) for T. trichiura/Cryptosporidium. Children from households using well or river water were associated with a greater odds of A. lumbricoides infection (aOR = 2.61, 95% CI: 1.12–6.05). Having a household lavatory was associated with a lower odds of T. trichiura infection (aOR = 0.50, 95% CI: 0.30–0.84). Children who had three meals at the school canteen on week days were at a lower risk of Cryptosporidium infection. The use of spring water as a water source was associated with lower odds of any intestinal infection (aOR = 0.56, 95% CI: 0.35–0.91). Conclusions: Our study calls for an intervention program of school-based deworming combined with health education, hygiene promotion and provision of safe water and improved sanitation.
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Affiliation(s)
- Dongjian Yang
- Department of Epidemiology, School of Public Health, Fudan University, 138 Yi Xue Yuan Road, Shanghai 200032, China.
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China.
- Center for Tropical Disease Research, Fudan University, Shanghai 200032, China.
| | - Ya Yang
- Department of Epidemiology, School of Public Health, Fudan University, 138 Yi Xue Yuan Road, Shanghai 200032, China.
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China.
- Center for Tropical Disease Research, Fudan University, Shanghai 200032, China.
| | - Yingjian Wang
- Department of Epidemiology, School of Public Health, Fudan University, 138 Yi Xue Yuan Road, Shanghai 200032, China.
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China.
- Center for Tropical Disease Research, Fudan University, Shanghai 200032, China.
| | - Yu Yang
- Department of Epidemiology, School of Public Health, Fudan University, 138 Yi Xue Yuan Road, Shanghai 200032, China.
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China.
- Center for Tropical Disease Research, Fudan University, Shanghai 200032, China.
| | - Shurong Dong
- Department of Epidemiology, School of Public Health, Fudan University, 138 Yi Xue Yuan Road, Shanghai 200032, China.
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China.
- Center for Tropical Disease Research, Fudan University, Shanghai 200032, China.
| | - Yue Chen
- School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, Ottawa, ON K1G 5Z3, Canada.
| | - Qingwu Jiang
- Department of Epidemiology, School of Public Health, Fudan University, 138 Yi Xue Yuan Road, Shanghai 200032, China.
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China.
- Center for Tropical Disease Research, Fudan University, Shanghai 200032, China.
| | - Yibiao Zhou
- Department of Epidemiology, School of Public Health, Fudan University, 138 Yi Xue Yuan Road, Shanghai 200032, China.
- Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Shanghai 200032, China.
- Center for Tropical Disease Research, Fudan University, Shanghai 200032, China.
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Yang Y, Gao J, Cheng W, Pan X, Yang Y, Chen Y, Dai Q, Zhu L, Zhou Y, Jiang Q. Three Gorges Dam: polynomial regression modeling of water level and the density of schistosome-transmitting snails Oncomelania hupensis. Parasit Vectors 2018. [PMID: 29540206 PMCID: PMC5853163 DOI: 10.1186/s13071-018-2687-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Background Schistosomiasis remains a major public health concern in China. Oncomelania hupensis (O. hupensis) is the sole intermediate host of Schistosoma japonicum, and its change in distribution and density influences the endemic S. japonicum. The Three Gorges Dam (TGD) has substantially changed the downstream water levels of the dam. This study investigated the quantitative relationship between flooding duration and the density of the snail population. Methods Two bottomlands without any control measures for snails were selected in Yueyang City, Hunan Province. Data for the density of the snail population and water level in both spring and autumn were collected for the period 2009–2015. Polynomial regression analysis was applied to explore the relationship between flooding duration and the density of the snail population. Results Data showed a convex relationship between spring snail density and flooding duration of the previous year (adjusted R2, aR2 = 0.61). The spring snail density remained low when the flooding duration was fewer than 50 days in the previous year, was the highest when the flooding duration was 123 days, and decreased thereafter. There was a similar convex relationship between autumn snail density and flooding duration of the current year (aR2 = 0.77). The snail density was low when the flooding duration was fewer than 50 days and was the highest when the flooding duration was 139 days. Conclusions There was a convex relationship between flooding duration and the spring or autumn snail density. The snail density was the highest when flooding lasted about four to 5 months.
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Affiliation(s)
- Ya Yang
- Fudan University School of Public Health, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Fudan University Center for Tropical Disease Research, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China
| | - Jianchuan Gao
- Fudan University School of Public Health, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Fudan University Center for Tropical Disease Research, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China
| | - Wanting Cheng
- Fudan University School of Public Health, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Fudan University Center for Tropical Disease Research, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China
| | - Xiang Pan
- Fudan University School of Public Health, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Fudan University Center for Tropical Disease Research, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China
| | - Yu Yang
- Fudan University School of Public Health, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Fudan University Center for Tropical Disease Research, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China
| | - Yue Chen
- School of Epidemiology and Public Health, Faculty of Medicine, University of Ottawa, 600 Peter Morand Crescent, Ottawa, ON, K1G 5Z3, Canada
| | - Qingqing Dai
- Department of Statistics, Oklahoma State University, Stillwater, 74078, USA
| | - Lan Zhu
- Department of Statistics, Oklahoma State University, Stillwater, 74078, USA
| | - Yibiao Zhou
- Fudan University School of Public Health, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China. .,Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China. .,Fudan University Center for Tropical Disease Research, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.
| | - Qingwu Jiang
- Fudan University School of Public Health, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Key Laboratory of Public Health Safety, Fudan University, Ministry of Education, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China.,Fudan University Center for Tropical Disease Research, Building 8, 130 Dong'an Road, Xuhui District, Shanghai, 200032, China
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