An alien intermediate snail host in Malawi - Orientogalba viridis (Quoy and Gaimard, 1832) - A new concern for schistosomiasis transmission in Africa?

Autor:	Juhász A; Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK.; Institute of Medical Microbiology, Semmelweis University, H-1089, Budapest, Hungary., Nkolokosa C; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Kambewa E; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Jones S; Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK., Cunningham LJ; Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK., Chammudzi P; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Kapira D; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Namacha G; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Lally D; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Kayuni SA; Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK.; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Makaula P; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Musaya J; Malawi-Liverpool-Wellcome Programme, Blantyre, Malawi., Stothard JR; Department of Tropical Disease Biology, Liverpool School of Tropical Medicine, Liverpool, L3 5QA, UK.
Jazyk:	angličtina
Zdroj:	International journal for parasitology. Parasites and wildlife [Int J Parasitol Parasites Wildl] 2024 Mar 01; Vol. 23, pp. 100919. Date of Electronic Publication: 2024 Mar 01 (Print Publication: 2024).
DOI:	10.1016/j.ijppaw.2024.100919
Abstrakt:	The freshwater amphibious snail Orientogalba viridis commonly occurs in eastern Asia, on certain Pacific islands and more importantly has recently dispersed into Europe. Since this snail is now considered an invasive species, its distribution is of growing parasitological interest as an alien intermediate host for various trematodes, particularly liver flukes. As part of ongoing surveillance for snail-borne diseases in Malawi, a population of O. viridis was first observed in May 2023, alongside an alarming presence of a human schistosome cercaria. This snail population later underwent detailed morphological characterisation with both snail and parasite identities confirmed upon DNA barcoding. This seminal observation triggered more extensive local snail surveys, finding 3 further populations in separated rice paddies, with further field-caught snails (n = 465) screened for infection and a selection used for repeated experimental challenges with miracidia from Schistosoma haematobium and Schistosoma mattheei . Although no field-caught (and experimentally exposed) snail was seen to shed schistosome cercariae, molecular xenomonitoring for schistosomiasis provided tangible evidence of putative transmission potential. Our first report of O. viridis here in Malawi, and more broadly in Africa, flags a need for increased vigilance for this invasive species alongside local clarification(s) of its transmission potential for trematodiases of either medical and/or veterinary importance. Competing Interests: All authors have participated in (a) conception and design, or analysis and interpretation of the data; (b) drafting the article or revising it critically for important intellectual content; and (c) approval of the final version. This manuscript has not been submitted to, nor is under review at, another journal or other publishing venue. (© 2024 The Authors.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu