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February 15, 2025Scientific ReportsOpen Access

A first report of Biomphalaria pfeifferi in the Lower Shire Valley, Southern Malawi, a major intermediate snail host species for intestinal schistosomiasis

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Authors

CNClinton NkolokosaRMRex B. MbeweJCJames Chirombo

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Overview

Field survey uncovers Biomphalaria pfeifferi across freshwater sites, indicating water chemistry and elevation drive intermediate snail host distribution for schistosomiasis.

Key Points

  • To detect and characterize intermediate snail host populations of Biomphalaria pfeifferi and identify environmental variables that predict their freshwater distribution in southern Malawi.
  • Conducted repeated malacological surveys across 45 freshwater sites in Chikwawa and Nsanje Districts.
  • Measured physicochemical and environmental parameters including water conductivity, pH, water temperature, total dissolved salts (TDS), and geographical elevation.
  • Applied Random Forest modeling to predict the presence or absence of snails based on recorded environmental conditions.
  • Identified the first documented presence of Biomphalaria pfeifferi snail hosts in the Lower Shire Valley.
  • Demonstrated that water conductivity, total dissolved salts, and geographical elevation served as the primary predictors of snail abundance, with water temperature and pH contributing less predictive influence.

Cite This Study

Nkolokosa et al. (2025) studied this question.

synapsesocial.com/papers/6a9b2f280cdce2eea469f9f0https://doi.org/10.1038/s41598-025-88930-4
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Also Consider

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  1. 1Predicting current habitat suitability for intermediate snail hosts of urogenital and intestinal schistosomiasis in the Lower Shire Valley floodplain of southern Malawi2025 · 5 citations
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  3. 3A geospatial analysis of local intermediate snail host distributions provides insight into schistosomiasis risk within under-sampled areas of southern Lake Malawi2024 · 13 citations
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