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Pulmonate snails (10,225 specimens) were collected from 39 freshwater lakes (in the four major geographic regions in Denmark) and subjected to shedding. Released schistosome cercariae were isolated and identified by polymerase chain reaction and sequencing whereby <jats:italic>Trichobilharzia regenti<\/jats:italic>, <jats:italic>Trichobilharzia franki<\/jats:italic>, <jats:italic>Trichobilharzia szidati<\/jats:italic> and <jats:italic>Trichobilharzia anseri<\/jats:italic> were recorded. Infections were primarily determined by biotic factors such as the presence of final host birds and intermediate host snails and water temperature was noted as an important abiotic parameter associated with the infection. No clear connection with other abiotic factors (conductivity, alkalinity, pH, nitrogen, phosphorous) was seen. The widespread occurrence of infected snails, when compared to previous investigations, suggests that climate changes at northern latitudes could be responsible for the increased risk of contracting cercarial dermatitis.<\/jats:p>","DOI":"10.1017\/s0022149x21000122","type":"journal-article","created":{"date-parts":[[2021,4,20]],"date-time":"2021-04-20T08:04:56Z","timestamp":1618905896000},"source":"Crossref","is-referenced-by-count":11,"title":["Avian schistosome species in Danish freshwater lakes: relation to biotic and abiotic factors"],"prefix":"10.1017","volume":"95","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-8039-1886","authenticated-orcid":false,"given":"A.","family":"Al-Jubury","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Y.","family":"Duan","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.W.","family":"Kania","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"E.S.","family":"Tracz","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Bygum","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"L.v.G.","family":"J\u00f8rgensen","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"P.","family":"Hor\u00e1k","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"K.","family":"Buchmann","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2021,4,20]]},"reference":[{"key":"S0022149X21000122_ref44","doi-asserted-by":"publisher","DOI":"10.1093\/molbev\/msy096"},{"key":"S0022149X21000122_ref55","doi-asserted-by":"publisher","DOI":"10.1016\/S1471-4922(03)00117-X"},{"key":"S0022149X21000122_ref18","doi-asserted-by":"publisher","DOI":"10.1139\/z02-198"},{"key":"S0022149X21000122_ref27","doi-asserted-by":"publisher","DOI":"10.1051\/parasite\/1998054349"},{"key":"S0022149X21000122_ref8","unstructured":"Bulaev, AI (1982) Experimental study of the elimination of cercariae by freshwater crustaceans Cyclops vicinus (order Cyclopoida). pp. 73\u201381 in Gel'minty v presnovodnykh biotsenozakh Moscow. 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