{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,11,4]],"date-time":"2026-11-04T20:34:31Z","timestamp":1793824471824,"version":"4.6.1"},"reference-count":38,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2018,1,31]],"date-time":"2018-01-31T00:00:00Z","timestamp":1517356800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/www.cambridge.org\/core\/terms"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J. Helminthol."],"published-print":{"date-parts":[[2019,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Vertebrate hosts commonly harbour concurrent infections of different helminth species which may interact with each other in a synergistic, antagonistic or negligible manner. Direct interactions between helminths that share a common site in the host have been regularly reported, but indirect interactions between species that occur in different sites are rarely described, especially in fish hosts. Plerocercoids of<jats:italic>Ligula intestinalis<\/jats:italic>are common infections of the peritoneal (body) cavity of roach (<jats:italic>Rutilus rutilus<\/jats:italic>) in freshwater habitats. These larval cestodes can cause extensive systemic pathologies to the fish host, which in turn may alter its susceptibility as a target host for other helminth species. The present study, using an existing dataset, investigates the influence of<jats:italic>L. intestinalis<\/jats:italic>(ligulosis) on frequently occurring eyefluke infections in roach sampled from a lake in south-east England. The occurrence of two species of eyefluke (<jats:italic>Diplostomum<\/jats:italic>sp. and<jats:italic>Tylodelphys<\/jats:italic>sp.) in the roach population demonstrated no significant levels of interaction with each other. The prevalence but not mean intensity or abundance of<jats:italic>Diplostomum<\/jats:italic>sp. was significantly increased in ligulosed roach, while the incidence of<jats:italic>Tylodelphys<\/jats:italic>sp. remained unchanged. Analyses of bilateral asymmetry in the occurrence of eyeflukes in left and right eyes of infected fish demonstrate that<jats:italic>Tylodelphys<\/jats:italic>sp. shows significant asymmetry in non-ligulosed roach, which is not replicated in ligulosed individuals. In contrast,<jats:italic>Diplostomum<\/jats:italic>sp. shows no evidence of asymmetry in either ligulosed or non-ligulosed fish.<\/jats:p>","DOI":"10.1017\/s0022149x17001213","type":"journal-article","created":{"date-parts":[[2018,1,31]],"date-time":"2018-01-31T09:42:08Z","timestamp":1517391728000},"page":"66-70","source":"Crossref","is-referenced-by-count":7,"title":["Influence of<i>Ligula intestinalis<\/i>plerocercoids (Cestoda: Diphyllobothriidea) on the occurrence of eyeflukes in roach (<i>Rutilus rutilus<\/i>) from a lake in south-east England"],"prefix":"10.1017","volume":"93","author":[{"given":"N.J.","family":"Morley","sequence":"first","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"J.W.","family":"Lewis","sequence":"additional","affiliation":[],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"56","published-online":{"date-parts":[[2018,1,31]]},"reference":[{"key":"S0022149X17001213_ref38","doi-asserted-by":"publisher","DOI":"10.1134\/S1995082912020162"},{"key":"S0022149X17001213_ref37","doi-asserted-by":"crossref","DOI":"10.1201\/b12595","volume-title":"Parasitic worms of fish","author":"Williams","year":"1994"},{"key":"S0022149X17001213_ref33","doi-asserted-by":"publisher","DOI":"10.1016\/j.fawpar.2016.07.002"},{"key":"S0022149X17001213_ref32","volume-title":"Quantitative parasitology 3.0","author":"Reiczigel","year":"2005"},{"key":"S0022149X17001213_ref29","doi-asserted-by":"publisher","DOI":"10.1017\/S0022149X16000870"},{"key":"S0022149X17001213_ref28","first-page":"1477","article-title":"The regular, separate, and joint occurrence of components in fish parasitocoenoses","volume":"41","author":"Markov","year":"1962","journal-title":"Zoologicheskii Zhurnal"},{"key":"S0022149X17001213_ref27","doi-asserted-by":"publisher","DOI":"10.1046\/j.1365-2427.2001.00733.x"},{"key":"S0022149X17001213_ref26","doi-asserted-by":"publisher","DOI":"10.1017\/S0031182001008538"},{"key":"S0022149X17001213_ref22","doi-asserted-by":"publisher","DOI":"10.1017\/S0031182010000107"},{"key":"S0022149X17001213_ref20","doi-asserted-by":"publisher","DOI":"10.1017\/S0031182007002430"},{"key":"S0022149X17001213_ref19","doi-asserted-by":"publisher","DOI":"10.1078\/0944-2006-00125"},{"key":"S0022149X17001213_ref17","doi-asserted-by":"publisher","DOI":"10.1111\/j.1095-8649.1987.tb05212.x"},{"key":"S0022149X17001213_ref13","doi-asserted-by":"publisher","DOI":"10.1016\/S0001-706X(02)00108-0"},{"key":"S0022149X17001213_ref12","doi-asserted-by":"publisher","DOI":"10.1017\/S0031182000085048"},{"key":"S0022149X17001213_ref11","first-page":"142","article-title":"Seasonal occurrence of helminths in freshwater fishes. 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