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Oncomelania

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https://www.readbyqxmd.com/read/28322847/identification-and-functional-characterization-of-oncomelania-hupensis-macrophage-migration-inhibitory-factor-involved-in-the-snail-host-innate-immune-response-to-the-parasite-schistosoma-japonicum
#1
Shuaiqin Huang, Yunchao Cao, Mingke Lu, Wenfeng Peng, Jiaojiao Lin, Chongti Tang, Liang Tang
Schistosomiasis, caused by parasitic trematodes of the genus Schistosoma, remains a devastating public health problem, with over 200 million people infected and 779 million people at risk worldwide, especially in developing countries. The freshwater amphibious snail Oncomelania hupensis is the obligate intermediate host of Schistosoma japonicum. This unique and long-standing host-parasite interaction highlights the biomedical importance of the molecular and cellular mechanisms involved in the snail immune defense response against schistosome infection...
March 17, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28292327/approaches-being-used-in-the-national-schistosomiasis-elimination-programme-in-china-a-review
#2
REVIEW
Le-Ping Sun, Wei Wang, Qing-Biao Hong, Shi-Zhu Li, You-Sheng Liang, Hai-Tao Yang, Xiao-Nong Zhou
Schistosomiasis japonica, caused by the human blood fluke Schistosoma japonicum, remains a major public health problem in China, although great success has been achieved. The control efforts during the past half-decade, notably the wide implementation of the new integrated strategy with emphasis on control of the source of S. japonicum infection across the country since 2004, has greatly reduced S. japonicum in humans, livestock, and intermediate host Oncomelania hupensis snails, and transmission control of schistosomiasis was achieved in China in 2015...
March 15, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/28288689/a-multidisciplinary-integrated-approach-for-the-elimination-of-schistosomiasis-a-longitudinal-study-in-a-historically-hyper-endemic-region-in-the-lower-reaches-of-the-yangtze-river-china-from-2005-to-2014
#3
Le-Ping Sun, Wei Wang, Yin-Ping Zuo, Qing-Biao Hong, Guang-Lin Du, Yu-Cai Ma, Jian Wang, Guo-Jing Yang, Dao-Jian Zhu, You-Sheng Liang
BACKGROUND: Although great success has been achieved, schistosomiasis remains a major public health concern in China, and the remaining core endemic regions are concentrated along the middle and lower reaches of the Yangtze River. In this longitudinal study, we evaluated the effectiveness of a multidisciplinary, integrated approach for schistosomiasis elimination in a historically hyper-endemic region in the lower reaches of the Yangtze River, China over the 10-year period from 2005 through 2014...
March 14, 2017: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/27977674/genetic-evidence-of-contemporary-dispersal-of-the-intermediate-snail-host-of-schistosoma-japonicum-movement-of-an-ntd-host-is-facilitated-by-land-use-and-landscape-connectivity
#4
Jennifer R Head, Howard Chang, Qunna Li, Christopher M Hoover, Thomas Wilke, Catharina Clewing, Elizabeth J Carlton, Song Liang, Ding Lu, Bo Zhong, Justin V Remais
BACKGROUND: While the dispersal of hosts and vectors-through active or passive movement-is known to facilitate the spread and re-emergence of certain infectious diseases, little is known about the movement ecology of Oncomelania spp., intermediate snail host of the parasite Schistosoma japonicum, and its consequences for the spread of schistosomiasis in East and Southeast Asia. In China, despite intense control programs aimed at preventing schistosomiasis transmission, there is evidence in recent years of re-emergence and persistence of infection in some areas, as well as an increase in the spatial extent of the snail host...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27903066/the-spatio-temporal-distribution-of-oncomelania-hupensis-along-yangtze-river-in-jiangsu-province-china-after-implementation-of-a-new-integrated-schistosomiasis-control-strategy
#5
Jian He, Wei Li, Robert Bergquist, Jian-Feng Zhang, Liang Shi, Song Zhao, Feng Wu, Kun Yang
This study concerns an integrated strategy of schistosomiasis control, focusing on the management and elimination of the main transmission cycles and reservoirs along Yangtze river, Jiangsu Province (China), instituted in 2004. Our analysis, including mapping, spatial autocorrelation and spatio-temporal scanning, was implemented between 2001 and 2013 to explore the changes in the distribution of Oncomelania hupensis, the intermediate host of Schistosoma japonicum. Two high-density snail locations in the upper and middle reaches of the river were observed along with one high-risk area due to infected snails in the upper reaches at the beginning of the study period...
November 29, 2016: Geospatial Health
https://www.readbyqxmd.com/read/27812902/long-term-effectiveness-of-the-integrated-schistosomiasis-control-strategy-with-emphasis-on-infectious-source-control-in-china-a-10-year-evaluation-from-2005-to-2014
#6
Xiaoli Wang, Wei Wang, Peng Wang
Schistosomiasis is a neglected tropical parasitic disease of great public health significance worldwide. Currently, mass drug administration with praziquantel remains the major strategy for global schistosomiasis control programs. Since 2005, an integrated strategy with emphasis on infectious source control was implemented for the control of schistosomiasis japonica, a major public health concern in China, and pilot studies have demonstrated that such a strategy is effective to reduce the prevalence of Schistosoma japonicum infection in both humans and bovines...
February 2017: Parasitology Research
https://www.readbyqxmd.com/read/27659095/the-influence-of-natural-factors-on-the-spatio-temporal-distribution-of-oncomelania-hupensis
#7
Gong Cheng, Dan Li, Dafang Zhuang, Yong Wang
BACKGROUND: We analyzed the influence of natural factors, such as temperature, rainfall, vegetation and hydrology, on the spatio-temporal distribution of Oncomelania hupensis and explored the leading factors influencing these parameters. The results will provide reference methods and theoretical a basis for the schistosomiasis control. METHODS: GIS (Geographic Information System) spatial display and analysis were used to describe the spatio-temporal distribution of Oncomelania hupensis in the study area (Dongting Lake in Hunan Province) from 2004 to 2011...
December 2016: Acta Tropica
https://www.readbyqxmd.com/read/27535177/multi-host-model-and-threshold-of-intermediate-host-oncomelania-snail-density-for-eliminating-schistosomiasis-transmission-in-china
#8
Yi-Biao Zhou, Yue Chen, Song Liang, Xiu-Xia Song, Geng-Xin Chen, Zhong He, Bin Cai, Wu-Li Yihuo, Zong-Gui He, Qing-Wu Jiang
Schistosomiasis remains a serious public health issue in many tropical countries, with more than 700 million people at risk of infection. In China, a national integrated control strategy, aiming at blocking its transmission, has been carried out throughout endemic areas since 2005. A longitudinal study was conducted to determine the effects of different intervention measures on the transmission dynamics of S. japonicum in three study areas and the data were analyzed using a multi-host model. The multi-host model was also used to estimate the threshold of Oncomelania snail density for interrupting schistosomiasis transmission based on the longitudinal data as well as data from the national surveillance system for schistosomiasis...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27469535/new-detection-method-in-experimental-mice-for-schistosomiasis-clinprotool-and-matrix-assisted-laser-desorption-ionization-time-of-flight-mass-spectrometry
#9
Yuzheng Huang, Wei Li, Kun Liu, Chunrong Xiong, Peng Cao, Jianping Tao
Oncomelania hupensis snails along the Yangtze River and the low positive rate and infectiosity of human and livestock schistosomiasis still pose a threat to public health in China. Adult blood flukes were recognized as Schistosoma japonicum, which are found in the portal system of the sentinel mice bred in the laboratory for 35 days after contact with the water. However, 35 days was too long from the field test to dissection, and the dissection in the laboratory was also time-consuming and labor-intensive...
November 2016: Parasitology Research
https://www.readbyqxmd.com/read/27469534/morphological-and-enzymatical-observations-in-oncomelania-hupensis-after-molluscicide-treatment-implication-for-future-molluscicide-development
#10
Tao Xiong, Qin Ping Zhao, Xing Jian Xu, Rong Liu, Ming Sen Jiang, Hui Fen Dong
A preparation of niclosamide named 50 % wettable powder of niclosamide ethanolamine salt (WPN), the only chemical molluscicide available in China, has been widely used for Oncomelania hupensis control over the past 20 years, but its molluscicidal mechanism has not been elucidated yet. Recently, a derivative of niclosamide, the salt of quinoid-2',5-dichloro-4'-nitro-salicylanilide (Liu Dai Shui Yang An, LDS), has been proven to have equivalent molluscicidal effects as WPN but with lower cost and significantly lower toxicity to fish than WPN...
November 2016: Parasitology Research
https://www.readbyqxmd.com/read/27453121/-schistosomiasis-must-be-eradicated-a-review-of-fighting-schitosomiasis-in-qingpu-shanghai
#11
REVIEW
S Z Yu
Qingpu, in western suburban of Shanghai, was one of serious schistosomiasis endemic counties in China. In 1958, in response to Chairman Mao' s call " Schistosomiasis must be eradicated", Shanghai First Medical College organized a research group to carry out schitosomiasis control in Qingpu. The prevalence of schistosomiasis was about 39% in 390 000 people and 8.4% in cattle. Oncomelania was distributed in an area of 70 million meter(2). The fighting project could be divided into two steps, the first one was from 1958 to 1974, during this period, the epidemic survey and patient treatment were conducted, and oncomelania control was carried out by using different kind of molluscides...
July 2016: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/27377962/the-three-gorges-dam-does-it-accelerate-or-delay-the-progress-towards-eliminating-transmission-of-schistosomiasis-in-china
#12
REVIEW
Yi-Biao Zhou, Song Liang, Yue Chen, Qing-Wu Jiang
The Three Gorges Dam, located in the largest endemic area of schistosomiasis in China, is one of the world's largest hydroelectric projects to date. Some large-scale hydro projects have resulted in schistosomiasis emergence or re-emergence. Therefore, the dam's potential impact on the transmission of Schistosoma japonicum has raised concerns from medical researchers worldwide. A systematic literature review, coupled with an analysis of data on the water level and snail density in the Yangtze River was conducted to assess the impact of the dam on schistosomiasis transmission after more than 10 years of operation...
July 5, 2016: Infectious Diseases of Poverty
https://www.readbyqxmd.com/read/27356422/-progress-of-researches-on-lysozyme-and-its-expression-in-oncomelania-hupensis
#13
REVIEW
Xiu-an Zhu, Han-tao Huang, Kang Du, An-yun Wang, Jin-song Zhao
Lysozyme generally exists in animals, plants and microorganisms, and it is used as a natural anti-infection material and one of the important non-specific immune factors in organisms. This paper reviews the progress of researches on its classification, gene structure and function, and expression regulation in Oncomelania hupensis, and on the factors affecting its activities in recent years, in order to further discuss its distribution in O. hupensis.
February 2016: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/27356421/-advances-in-researches-of-molluscicidal-microorganisms-against-oncomelania-hupensis
#14
REVIEW
Wan-ting Cheng, Yi-biao Zhou, Xiang Pan, Xiu-xia Song, Qing-wu Jiang
The elimination of Oncomelania hupensis snails is important to schistosomiasis control. Recently, the application of molluscicidal organisms is considered as a safe and efficient method for snail elimination. In order to provide scientific evidences for effective control of O. hupensis and schistosomiasis, this paper summarizes the researches of molluscicidal microorganisms against O. hupensis.
February 2016: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/27356418/-analysis-of-schistosomiasis-endemic-situation-in-yizhou-city-from-2011-to-2014
#15
Mei-juan Wei, Sheng-jun Chen, Si-yang Wu
OBJECTIVE: To evaluate the effect of schistosomiasis control in Yizhou City, Guangxi Zhuang Autonomous Region, from 2011 to 2014, so as to provide the evidence for formulating the further prevention and control strategy. METHODS: The schistosomiasis surveillance data were collected and analyzed in Yizhou City from 2011 to 2014. RESULTS: From 2011 to 2014, 770.38 hm² was surveyed for the Oncomelania hupensis snails, and two snail infested sites were found, while no infected snails were found...
February 2016: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/27356415/-gis-platform-for-real-time-monitoring-and-early-warning-of-forestry-schistosomiasis-control-project-a-case-study-in-renshou-county-sichuan-province
#16
Meng Cao, Qi-xiang Sun, Zhi-hua Guo
OBJECTIVE: To real-timely monitor the environment in the forestry schistosomiasis control project (CFSCP) area and to early warn the status of Oncomelania hupensis snails in the schistosomiasis endemic area. METHODS: Based on ArcGIS Engine 10.1 software, the Geographic Information System (GIS) platform of the forestry schistosomiasis project of real-time monitoring, early warning and emergency management in Renshou County, Sichuan Province, was designed and established...
February 2016: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/27356412/-development-and-application-of-jingcen-dy-1-spraying-tanker-for-oncomelania-hupensis-snail-control
#17
Jia-song Wang, Liang-cai He, Xian-bing Rong, Mei-zhi Yuan, Min Wang, Ke-jun Wang, Ya-dong Zhou, Ke- qing Tian, Xiao-feng Zhang
OBJECTIVE: To develop a Jingcen DY-1 type spraying tanker for Oncomelania hupensis snail control and evaluate its effect of field application as well as the cost. METHODS: The currently available tractor was used as a vector, and the mechanical and electrical equipments and containers were integrated with shafts, pipelines and electric lines to produce a spraying tanker for snail control, with the functions of carrying people and molluscicides, generating electric power and getting water, mixing stocking solutions, adjusting molluscicide solutions evenly, and spraying drugs...
February 2016: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/27356408/-impact-of-ecological-protection-construction-on-schistosomiasis-transmission-of-qionghai-lake-wetland-in-xichang-city
#18
Zong-liang Feng, Cong-min Xu, Hong-zhi Yin, Jiao Hua, Yu-hua Lai, Lin Zhao, Zhong-ping Wu
OBJECTIVE: To understand the impact of Qionghai Lake wetland ecological protection construction on the prevalence of schistosomiasis, so as to provide the evidence for formulating the strategies for schistosomiasis control and prevention. METHODS: A retrospective survey of the construction of Qionghai Lake wetland was performed, and eleven villages around the wetland were surveyed for schistosomiasis endemic situation. The influence of the wetland project on the schistosomiasis prevalence and Oncomelania hupensis snail status were investigated...
February 2016: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/27356406/-analysis-of-oncomelania-hupensis-status-in-schistosomiasis-surveillance-sites-of-yunnan-province-in-2015
#19
Mei-fen Shen, Xi-guang Feng, Ning-bo Huang, Yun Zhang, Ming-shou Wu, Jing Song, Meng-tao Xiong, Li-fang Wang
OBJECTIVE: To understand the Oncomelania hupensis distribution and infection status in the schistosomiasis surveillance sites of Yunnan Province, so as to provide the evidence for making the control and prevention measures. METHODS: Eighteen administrative villages were selected as the surveillance sites where the schistosomiasis endemic was serious in 18 epidemic counties, one village for one county. The snail status was investigated with the systematic sampling and environmental sampling methods, and the infection status of the snails was detected by a microscope and loop-mediated isothermal amplification (LAMP)...
February 2016: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
https://www.readbyqxmd.com/read/27356397/-integration-and-demonstration-of-key-techniques-in-surveillance-and-forecast-of-schistosomiasis-in-jiangsu-province-iii-development-of-a-machine-simultaneously-integrating-mechanized-environmental-cleaning-and-automatic-mollusciciding
#20
Fu-biao Wang, Yu-cai Ma, Le-ping Sun, Qing-biao Hong, Yang Gao, Chang-lin Zhang, Guang-lin Du, Da-qin Lu, Zhi-yong Sun, Wei Wang, Jian-rong Dai, You-sheng Liang
OBJECTIVE: To develop a machine simultaneously integrating mechanized environmental cleaning and automatic mollusciciding and to evaluate its effectiveness of field application, so as to provide a novel Oncomelania hupensis snail control technique in the large-scale marshlands. METHODS: The machine simultaneously integrating mechanized environmental cleaning and automatic mollusciciding, which was suitable for use in complex marshland areas, was developed according to the mechanization and automation principles, and was used for O...
February 2016: Zhongguo Xue Xi Chong Bing Fang Zhi za Zhi, Chinese Journal of Schistosomiasis Control
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