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. 2024 Dec 18;17:521. doi: 10.1186/s13071-024-06546-5

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Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated in a credit line to the data.

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Fig. 2 — Overview of the 41 sites surveyed during malacological surveys 1, 2 and 3, Lake Malawi, Mangochi District, Malawi. Yellow circles denote sites where Biomphalaria were found during at least one of all three surveys. Red circles denote sites where Biomphalaria snails were not found during any of the three surveys (Additional file 1: Table S1). Only one Biomphalaria was found to be actively shedding Schistosoma cercariae (later identified as S. mansoni) during cercarial shedding analyses (during survey 3) at survey site 27; denoted by red arrow. Malawi’s country border can be seen within the figure inset (upper left corner). Inset: study area is highlighted by red box. Figure was generated using the ‘mapview’ package version 2.10.0 [39] within R Studio version 2021.09.0, build 351 (Posit, Boston, MA, USA) [40]