{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,21]],"date-time":"2026-02-21T06:21:57Z","timestamp":1771654917436,"version":"3.50.1"},"reference-count":20,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2021,12,22]],"date-time":"2021-12-22T00:00:00Z","timestamp":1640131200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["TropicalMed"],"abstract":"<jats:p>The objective of this pilot malacological survey was to identify the snail intermediate hosts for Schistosoma\u00a0haematobium in endemic rural and semi-urban areas of Gabon. Snails were collected, morphologically identified, and tested for infection by cercarial shedding. Released cercariae were morphologically identified using low-power light microscopy. A total of six species of snails were collected throughout the study area, with Bulinus\u00a0truncatus, B. forskalii, and Potadoma spp. being the most predominant species collected. Only the Bulinus species were tested for infection by cercarial shedding, of which only B. truncatus shed cercariae. Some B. truncatus shed mammalian schistosome cercariae, while others shed Gymnocephalus cercariae. Our results indicate that B. truncatus appears to be a potential intermediate host of schistosomiasis in Gabon, where cases of S. haematobium, S. guineensis, and S. intercalatum infection are reported. However, it will be important to further understand the species diversity and transmission dynamics of schistosomes.<\/jats:p>","DOI":"10.3390\/tropicalmed7010001","type":"journal-article","created":{"date-parts":[[2021,12,22]],"date-time":"2021-12-22T01:08:09Z","timestamp":1640135289000},"page":"1","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Pilot Malacology Surveys for the Intermediate Hosts of Schistosomiasis in Rural and Semi-Urban Areas of the Moyen-Ogoou\u00e9 Province, Gabon"],"prefix":"10.3390","volume":"7","author":[{"given":"Jean Claude","family":"Dejon Agob\u00e9","sequence":"first","affiliation":[{"name":"Centre de Recherches M\u00e9dicales de Lambar\u00e9n\u00e9 (CERMEL), Lambar\u00e9n\u00e9 P.O. Box 242, Gabon"},{"name":"Center of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Division of Internal Medicine, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, P.O. Box 22660, 1100 DD Amsterdam, The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9644-8480","authenticated-orcid":false,"given":"Henry Curtis","family":"Kariuki","sequence":"additional","affiliation":[{"name":"School of Medicine and Health Sciences, Kenya Methodist University (KeMU), P.O. Box 267, Meru 60200, Kenya"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jeannot Fr\u00e9jus","family":"Zinsou","sequence":"additional","affiliation":[{"name":"Centre de Recherches M\u00e9dicales de Lambar\u00e9n\u00e9 (CERMEL), Lambar\u00e9n\u00e9 P.O. Box 242, Gabon"},{"name":"Leiden Medical University Centre, University of Leiden, Albinusdreef 2, 2333 ZA Leiden, The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-9726-6643","authenticated-orcid":false,"given":"Yabo Josiane","family":"Honkpehedji","sequence":"additional","affiliation":[{"name":"Centre de Recherches M\u00e9dicales de Lambar\u00e9n\u00e9 (CERMEL), Lambar\u00e9n\u00e9 P.O. Box 242, Gabon"},{"name":"Leiden Medical University Centre, University of Leiden, Albinusdreef 2, 2333 ZA Leiden, The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Martin Peter","family":"Grobusch","sequence":"additional","affiliation":[{"name":"Centre de Recherches M\u00e9dicales de Lambar\u00e9n\u00e9 (CERMEL), Lambar\u00e9n\u00e9 P.O. Box 242, Gabon"},{"name":"Center of Tropical Medicine and Travel Medicine, Department of Infectious Diseases, Division of Internal Medicine, Amsterdam University Medical Centers, Location AMC, University of Amsterdam, P.O. Box 22660, 1100 DD Amsterdam, The Netherlands"},{"name":"Institut f\u00fcr Tropenmedizin, Eberhad Karls Universit\u00e4t T\u00fcbingen, Wilhelmstra\u00dfe 27, 72074 T\u00fcbingen, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3197-5946","authenticated-orcid":false,"given":"Ayola Akim","family":"Adegnika","sequence":"additional","affiliation":[{"name":"Centre de Recherches M\u00e9dicales de Lambar\u00e9n\u00e9 (CERMEL), Lambar\u00e9n\u00e9 P.O. Box 242, Gabon"},{"name":"Leiden Medical University Centre, University of Leiden, Albinusdreef 2, 2333 ZA Leiden, The Netherlands"},{"name":"Institut f\u00fcr Tropenmedizin, Eberhad Karls Universit\u00e4t T\u00fcbingen, Wilhelmstra\u00dfe 27, 72074 T\u00fcbingen, Germany"},{"name":"German Centre for Infection Research (DZIF), Partner Site T\u00fcbingen, Wilhelmstra\u00dfe 27, 72074 T\u00fcbingen, Germany"},{"name":"German Centre for Infection Research (DZIF), African Partner Institution, CERMEL, Lambar\u00e9n\u00e9 P.O. Box 242, Gabon"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,12,22]]},"reference":[{"key":"ref_1","unstructured":"WHO (2021, May 25). Water-Related Diseases. Available online: http:\/\/www.who.int\/water_sanitation_health\/diseases-risks\/diseases\/schisto\/en\/."},{"key":"ref_2","unstructured":"World Health Organization (2021, June 10). Fact Sheet: Schistosomiasis. Available online: http:\/\/www.who.int\/news-room\/fact-sheets\/detail\/schistosomiasis."},{"key":"ref_3","unstructured":"World Health Organization Freshwater Snails. Vector, Available online: https:\/\/www.who.int\/water_sanitation_health\/resources\/vector337to356.pdf."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"412","DOI":"10.1016\/j.actatropica.2018.06.009","article-title":"The epidemiology of schistosomiasis in Lango region Uganda 60 years after Schwetz 1951: Can schistosomiasis be eliminated through mass drug administration without other supportive control measures?","volume":"185","author":"Adriko","year":"2018","journal-title":"Acta Trop."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"81","DOI":"10.1017\/S0022149X09990289","article-title":"Morphometric and molecular characterizations of schistosome populations in Estuaire province Gabon","volume":"84","author":"Nguema","year":"2010","journal-title":"J. Helminthol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"500","DOI":"10.1007\/s00508-020-01794-8","article-title":"Development of sustainable research excellence with a global perspective on infectious diseases: Centre de Recherches M\u00e9dicales de Lambar\u00e9n\u00e9 (CERMEL), Gabon","volume":"133","author":"Ramharter","year":"2021","journal-title":"Wien Klin Wochenschr."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"388","DOI":"10.1186\/2193-1801-3-388","article-title":"Assessment of the effect of Schistosoma haematobium co infection on malaria parasites and immune responses in rural populations in Gabon: Study protocol","volume":"3","author":"Zinsou","year":"2014","journal-title":"SpringerPlus"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Dejon-Agob\u00e9, J.C., Zinsou, J.F., Honkpehedji, Y.J., Ateba-Ngoa, U., Edoa, J.-R., Adegbite, B.R., Mombo-Ngoma, G., Agnandji, S.T., Ramharter, M., and Kremsner, P.G. (2018). Schistosoma haematobium effects on Plasmodium falciparum infection modified by soil-transmitted helminths in school-age children living in rural areas of Gabon. PLoS Negl. Trop. Dis., 12.","DOI":"10.1371\/journal.pntd.0006663"},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"325","DOI":"10.4269\/ajtmh.19-0835","article-title":"Epidemiology of schistosomiasis and soil-transmitted helminth co-infections among school children living in Lambar\u00e9n\u00e9, Gabon","volume":"103","author":"Honkpehedji","year":"2020","journal-title":"Am. J. Trop. Med. Hyg."},{"key":"ref_10","unstructured":"WHO Snail Identification Centre\u2014Danish Bilharziasis Laboratory (1973). A Field Guide to African Freshwater Snails. 3: North East African Species, WHO."},{"key":"ref_11","first-page":"181","article-title":"An introductory guide to the identification of cercariae from African freshwater snails with special reference to cercariae of trematode species of medical and veterinary importance","volume":"41","author":"Frandsen","year":"1984","journal-title":"Acta Trop."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"61","DOI":"10.1007\/BF00932919","article-title":"Bulinus tropicus from Central Kenya acting as a host for Schistosoma bovis","volume":"71","author":"Southgate","year":"1985","journal-title":"Z. Parasitenkd"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1186\/s13071-019-3381-3","article-title":"Molecular characterization and distribution of Schistosoma cercariae collected from naturally infected bulinid snails in northern and central C\u00f4te d\u2019Ivoire","volume":"12","author":"Webster","year":"2019","journal-title":"Parasit. Vectors"},{"key":"ref_14","first-page":"556","article-title":"Effect of seasonal rainfall and other environmental changes, on snail density and infection rates with Schistosoma mansoni fifteen years after the last snails\u2019 study in Kigungu, Entebbe, Uganda","volume":"85","author":"Kironde","year":"2008","journal-title":"East Afr. Med. J."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"226","DOI":"10.1186\/1756-3305-4-226","article-title":"Malacological survey and geographical distribution of vector snails for schistosomiasis within informal settlements of Kisumu City, western Kenya","volume":"4","author":"Opisa","year":"2011","journal-title":"Parasit. Vectors"},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"353","DOI":"10.1186\/s13071-017-2284-4","article-title":"Prevalence and seasonal transmission of Schistosoma haematobium infection among school-aged children in Kaedi town, southern Mauritania","volume":"10","author":"Ba","year":"2017","journal-title":"Parasit. Vectors"},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"509","DOI":"10.1093\/mollus\/55.4.509","article-title":"Freshwater snails of the Bulinus truncatus\/tropicus complex in Kenya: Tetraploid species","volume":"55","author":"Brown","year":"1989","journal-title":"J. Molluscan. Stud."},{"key":"ref_18","unstructured":"WHO (2019, June 02). WHO|Paragonimiasis. Available online: http:\/\/www.who.int\/foodborne_trematode_infections\/paragonimiasis\/en\/."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"340","DOI":"10.1016\/j.tmaid.2006.01.003","article-title":"Extra-pulmonary paragonimiasis with unusual arthritis and cutaneous features among a tourist returning from Gabon","volume":"4","author":"Malvy","year":"2006","journal-title":"Travel Med. Infect. Dis."},{"key":"ref_20","first-page":"105","article-title":"Paragonimus uterobilateralis as the cause of 3 cases of human paragonimiasis in Gabon","volume":"34","author":"Sachs","year":"1983","journal-title":"Tropenmed. Parasitol."}],"container-title":["Tropical Medicine and Infectious Disease"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/2414-6366\/7\/1\/1\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,11]],"date-time":"2025-10-11T07:50:52Z","timestamp":1760169052000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/2414-6366\/7\/1\/1"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2021,12,22]]},"references-count":20,"journal-issue":{"issue":"1","published-online":{"date-parts":[[2022,1]]}},"alternative-id":["tropicalmed7010001"],"URL":"https:\/\/doi.org\/10.3390\/tropicalmed7010001","relation":{},"ISSN":["2414-6366"],"issn-type":[{"value":"2414-6366","type":"electronic"}],"subject":[],"published":{"date-parts":[[2021,12,22]]}}}