Establishment of a GIS monitoring system for schistosomiasis japonica in Kofu, Japan

Nihei, Naoko; Kajihara, Noriaki; Kirinoki, Masashi; Chigusa, Yuichi; Matsuda, Hajime; Saitoh, Yasuhide; Shimamura, Ryota; Kaneta, Hiroyuki

doi:10.1179/136485906x86293

Cited by 11 publications

(10 citation statements)

References 13 publications

(22 reference statements)

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“…Discussion GIS technology has been used to describe the ecology, distribution and abundance of medically important snail intermediate host-parasite systems, including Schistosoma japonicum-Oncomelania hupensis (Maszle et al, 1998;Zheng et al, 1998;Zhou et al, 1999;Yang et al, 2005), S. japonicum-O. nosophora (Nihei et al, 2006), S. mansoni-Biomphalaria pfeifferi (Kristensen et al, 2001), S. haematobium-Bulinus truncatus (Yousif et al, 1998), O. viverrini-B. funiculata (Ngern-klun et al, 2006 and Fasciola-Lymnaea spp.…”

Section: Resultsmentioning

confidence: 99%

Effect of soil surface salt on the density and distribution of the snail Bithynia siamensis goniomphalos in northeast Thailand

Suwannatrai

Haruay

et al. 2011

Geospat Health

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Abstract.Opisthorchis viverrini infection is associated with human cholangiocarcinoma and northeast Thailand has the highest incidence of this disease in the world. Bithynia siamensis goniomphalos is the major freshwater snail intermediate host of O. viverrini in this area and an analysis based on geographical information systems was used to determine the effect of variation in soil surface salt on the density and distribution of this snail. A malacological survey was carried out in 56 water bodies in the Khorat basin, northeast Thailand at locations with various soil surface salt levels. Mollusk samples were collected from 10 ecologically representative water body sites with 10-20 sampling stations in each. The shoreline of clear, shallow water bodies was found to be the preferred B. s. goniomphalos habitat. The snails were exclusively found in water with salinity levels ranging between 0.05 and 22.11 parts per thousand (ppt), which supports the notion that B. s. goniomphalos prefers water with some saline content over pure, freshwater. The highest snail population densities were in rice fields, ponds, road-side ditches and canals within a water salinity range of 2.5-5.0 ppt. However, the presence of B. s. goniomphalos was negatively correlated with water salinity (P ≤0.05), both with regard to density and distribution. The areas with the highest density of B. s. goniomphalos were those with less than 1% soil surface salt (potential index = 0.314), while the lowest densities were found in areas exceeding 50% soil surface salt (potential index = 0.015).

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Section: Resultsmentioning

confidence: 99%

Effect of soil surface salt on the density and distribution of the snail Bithynia siamensis goniomphalos in northeast Thailand

Suwannatrai

Haruay

et al. 2011

Geospat Health

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“…This type of analysis has contributed to epidemiological studies of other diseases (i.e., rabies, bovine tuberculosis, schistosomiasis [29]–[32]). This study indicates that the risk of cysticercosis is widely dispersed throughout rural pig-rearing households rather than being focused in specific households.…”

Section: Discussionmentioning

confidence: 99%

Spatial Distribution of Taenia solium Porcine Cysticercosis within a Rural Area of Mexico

et al. 2008

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Cysticercosis is caused by Taenia solium, a parasitic disease that affects humans and rurally bred pigs in developing countries. The cysticercus may localize in the central nervous system of the human, causing neurocysticercosis, the most severe and frequent form of the disease. There appears to be an association between the prevalence of porcine cysticercosis and domestic pigs that wander freely and have access to human feces. In order to assess whether the risk of cysticercosis infection is clustered or widely dispersed in a limited rural area, a spatial analysis of rural porcine cysticercosis was applied to 13 villages of the Sierra de Huautla in Central Mexico. Clustering of cases in specific households would indicate tapeworm carriers in the vicinity, whereas their dispersal would suggest that the ambulatory habits of both humans and pigs contribute to the spread of cysticercosis. A total of 562 pigs were included in this study (August–December 2003). A global positioning system was employed in order to plot the geographic distribution of both cysticercotic pigs and risk factors for infection within the villages. Prevalence of pig tongue cysticercosis varied significantly in sampled villages (p = 0.003), ranging from 0% to 33.3% and averaging 13.3%. Pigs were clustered in households, but no differences in the clustering of cysticercotic and healthy pigs were found. In contrast, the presence of pigs roaming freely and drinking stagnant water correlated significantly with porcine cysticercosis (p = 0.07), as did the absence of latrines (p = 0.0008). High prevalence of porcine cysticercosis proves that transmission is still quite common in rural Mexico. The lack of significant differentiation in the geographical clustering of healthy and cysticercotic pigs weakens the argument that focal factors (e.g., household location of putative tapeworm carriers) play an important role in increasing the risk of cysticercosis transmission in pigs. Instead, it would appear that other wide-ranging biological, physical, and cultural factors determine the geographic spread of the disease. Extensive geographic dispersal of the risk of cysticercosis makes it imperative that control measures be applied indiscriminately to all pigs and humans living in this endemic area.

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“…For the M&S of schistosomiasis at the post-control/elimination stage, 15 articles obtained in this review indeed mentioned the use of spatial technology, out of which the majority focused on using it for monitoring snail density [12,15,18,[99][100][101][103][104][105][106][107][108][109][110][111]. At present, snail surveys are extremely time-consuming as they are conducted manually and their quality can be influenced by many factors, such as temperature, light, and vegetation.…”

Section: The Introduction Of Spatial Technologymentioning

confidence: 96%

“…derived from RS and GE, weather conditions, GPS coordinates, and direct data from M&S sites (e.g., infection rate) can be used to spatially analyze complex geospatial data and to construct maps showing not only high-risk areas, but also the scope of disease/intermediate host distribution. These maps can be considered as an innovative tool to further guide risk-based surveillance strategies [18,[101][102][103][104]. Finally, the application of the aforementioned tools combined with statistical or mathematical modeling provides important advances to explore spatiotemporal transmission dynamics, trends in habitat range, and risk/environmental factors of diseases in the past, present, and future [105][106][107][108].…”

Section: The Introduction Of Spatial Technologymentioning

confidence: 99%

Currently Available Monitoring and Surveillance Systems for Taenia spp., Echinococcus spp., Schistosoma spp., and Soil-Transmitted Helminths at the Control/Elimination Stage: A Systematic Review

Saelens

Gabriël

2020

Pathogens

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An increasing global focus on neglected tropical diseases (NTDs) has resulted in the set up of numerous control and elimination activities worldwide. This is partly true for Taenia solium taeniasis/cysticercosis, the most important foodborne parasitic infection. Despite substantial progress, adequate monitoring and surveillance (M&S) are required to sustain a status of control/elimination. This is often lacking, especially for T. solium. Therefore, the objective was to conduct a systematic literature review of the currently available M&S systems at the control/elimination stage of the four top-ranked helminth NTDs. Specifically, Taenia spp., Echinococcus spp., Schistosoma spp., and soil-transmitted helminths (STHs) were considered to determine if there are any similarities between their M&S systems and whether certain approaches can be adopted from each other. The systematic review demonstrated that rigorous M&S systems have been designed for the control/elimination stage of both STHs and schistosomiasis, particularly in China. On the other hand, a concept of M&S for Taenia spp. and Echinococcus spp. has not been fully developed yet, due to a lack of epidemiological data and the fact that many endemic countries are far away from reaching control/elimination. Moreover, accurate diagnostic tools for all four diseases are still imperfect, which complicates proper M&S. Finally, there is an urgent need to develop and harmonize/standardize M&S activities in order to reliably determine and compare the epidemiological situation worldwide.

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Establishment of a GIS monitoring system for schistosomiasis japonica in Kofu, Japan

Cited by 11 publications

References 13 publications

Effect of soil surface salt on the density and distribution of the snail Bithynia siamensis goniomphalos in northeast Thailand

Effect of soil surface salt on the density and distribution of the snail Bithynia siamensis goniomphalos in northeast Thailand

Spatial Distribution of Taenia solium Porcine Cysticercosis within a Rural Area of Mexico

Currently Available Monitoring and Surveillance Systems for Taenia spp., Echinococcus spp., Schistosoma spp., and Soil-Transmitted Helminths at the Control/Elimination Stage: A Systematic Review

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