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Published: 2026-04-03
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DOI: https://doi.org/10.52163/yhc.v67iCD4.4783
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Tập 67 Số CĐ4 - HNKH Ký sinh trùng toàn quốc lần thứ 52
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Articles
How to Cite
Tuấn, L. Q., Tuấn, T. A., Hà, N. V., Bích, N. N., & Hùng, N. M. (2026). INFECTION RISK PATTERNS OF CLONORCHIOSIS CLONORCHIS SINENSIS ASSOCIATED WITH THE FRESHWATER SNAIL PARAFOSSARULUS MANCHOURICUS IN NORTHERN VIETNAM. Vietnam Journal of Community Medicine, 67(CD4). https://doi.org/10.52163/yhc.v67iCD4.4783

INFECTION RISK PATTERNS OF CLONORCHIOSIS CLONORCHIS SINENSIS ASSOCIATED WITH THE FRESHWATER SNAIL PARAFOSSARULUS MANCHOURICUS IN NORTHERN VIETNAM

Le Quang Tuan1,2, Tran Anh Tuan1,2, Nguyen Van Ha1,2, Nguyen Ngoc Bich3, Nguyen Manh Hùng1,2
1 Institute of Biology, Vietnam Academy of Science and Technology
2 Institute of Science and Technology, Vietnam Academy of Science and Technology
3 Hanoi Medical University

Main Article Content

Abstract

Objective: The freshwater snail Parafossarulus manchouricus serves as the critical biological link in the transmission cycle of the small liver fluke (Clonorchis sinensis), a pressing public health issue in Vietnam. This study aims to identify bioclimatic factors limiting the species' distribution and construct an epidemiological risk map using an ecological modeling approach.


Methods: We applied an Ensemble Species Distribution Modelling (SDM) approach, combining four machine learning algorithms (Maxnet, GLM, MARS, Random Forest), to analyze data from 279 occurrence points in Northern Vietnam alongside bioclimatic variables.


Results: The model achieved excellent predictive performance with an AUC value of 0,983. The results indicate that the distribution of P. manchouricus is strongly governed by three factors: Mean Diurnal Range (Bio2), Min Temperature of Coldest Month (Bio6), and Precipitation of Driest Month (Bio14). High-risk hotspots were identified along the coastal regions of the Red River Delta and North Central Coast, comprising Ninh Binh, Nam Dinh, Hai Phong, and Quang Ninh provinces, with an estimated core area of approximately 11.490 km².


Conclusion: This risk map provides a quantitative scientific basis for preventive health authorities to prioritize surveillance in identified hotspots. Control strategies should focus on managing aquaculture environments and implementing biological control measures in areas with high ecological suitability indices to interrupt the transmission cycle to humans

Article Details

Keywords

Parafossarulus manchouricus, Clonorchis sinensis, Species Distribution Modelling, Clonorchiosis.

References

[1]. Bộ Tài nguyên và môi trường. (2020). Kịch bản biến đổi khí hậu, nước biển dâng cho Việt Nam.
[2] Đặng Ngọc Thanh, Hồ Thanh Hải (2017). Động vật chí Việt Nam, Tập 29: Trai, ốc nước ngọt nội địa Việt Nam (Mollusca: Gastropoda, Bivalvia). Nhà xuất bản Khoa học Tự nhiên và Công nghệ, Hà Nội.
[3]. Cao, Yong et al. (2013), Using maxent to model the historic distributions of stonefly species in Illinois streams: the effects of regularization and threshold selections, Ecological Modelling, Vol.259: pp.30–39.
[4]. Elith, Jane et al. (2006), Novel methods improve prediction of species’ distributions from occurrence data, Ecography, Vol.29(2): pp.129–51. http://doi.wiley.com/10.1111/j
.0906-7590.04596.x.
[5]. Fielding, Alan H. and John F. Bell. (1997), A review of methods for the assessment of prediction errors in conservation presence/absence models, Environmental Conservation Vol.24(1): pp.38–49.
[6]. Jarvis, A., Guevara, E., Reuter, H. I., Nelson, A. D. (2008), Hole-Filled SRTM for the globe : Version 4 : Data Grid, Database (http://srtm.csi.cgiar.org): from http://srtm.csi.cgiar.org/Package “biomod2” Type Package Title Ensemble Platform for Species Distribution Modeling. 2016.
[7]. Phillips, Steven J. et al. (2009), Sample selection bias and presence-only distribution models: implications for background and pseudo-absence data, Ecological Applications Vol.19(1):pp.181–97. http://doi.wiley.com/10.1890/07-2153.1.