{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T05:05:46Z","timestamp":1777439146706,"version":"3.51.4"},"reference-count":28,"publisher":"Cambridge University Press (CUP)","issue":"4","license":[{"start":{"date-parts":[[2014,4,17]],"date-time":"2014-04-17T00:00:00Z","timestamp":1397692800000},"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":[[2015,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The liver fluke, <jats:italic>Opisthorchis viverrini,<\/jats:italic> and the minute intestinal fluke, <jats:italic>Haplorchis taichui,<\/jats:italic> are prevalent in many Asian countries. This study analysed the patterns of infections of <jats:italic>O. viverrini<\/jats:italic> and <jats:italic>H. taichui<\/jats:italic> in Lahanam and Thakhamlien villages (Savannakhet Province, Lao PDR), in two cross-sectional investigations. Out of a total of 207 human participants, post-anthelmintic treatment positivity rates for expelled worms were 170 (82.1%) for <jats:italic>H. taichui<\/jats:italic> and 65 (31.4%) for <jats:italic>O. viverrini.<\/jats:italic> Both these species co-exist in the study villages. When each parasite was analysed separately, <jats:italic>H. taichui<\/jats:italic> infections reached a plateau among people aged &gt;20 years. <jats:italic>Opisthorchis viverrini<\/jats:italic> infection rates were highest in the age group 21\u201330 years, with decreasing infection rates after the age of 30. Our findings indicated that fish-borne trematode infections were more prevalent among adults. Fish, common intermediate hosts, were acquired in the study area for analysis. The examination of 35 species of fish as intermediate hosts found <jats:italic>O. viverrini<\/jats:italic> metacercariae in only six species, and these were found mostly during the month of November. Many farmers who live on the rice fields obtain their food from their immediate environment, including these intermediate-host fish, potentially putting them at greater risk of <jats:italic>O. viverrini<\/jats:italic> infection. By contrast, <jats:italic>H. taichui<\/jats:italic> metacercariae were found in three species of fish obtained from the market, meaning that anyone could consume them and become infected. If people who work in rice fields limit the species of fish they consume, or avoid consuming raw fish during the month of November, they may reduce their risk of <jats:italic>O. viverrini<\/jats:italic> infection.<\/jats:p>","DOI":"10.1017\/s0022149x14000261","type":"journal-article","created":{"date-parts":[[2014,4,17]],"date-time":"2014-04-17T08:44:38Z","timestamp":1397724278000},"page":"439-445","source":"Crossref","is-referenced-by-count":20,"title":["Patterns of trematode infections of <i>Opisthorchis viverrini<\/i> (Opisthorchiidae) and <i>Haplorchis taichui<\/i> (Heterophyidae) in human populations from two villages in Savannakhet Province, Lao PDR"],"prefix":"10.1017","volume":"89","author":[{"given":"M.","family":"Sato","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"T.","family":"Pongvongsa","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S.","family":"Sanguankiat","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"T.","family":"Yoonuan","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.","family":"Kobayashi","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B.","family":"Boupha","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F.","family":"Nishimoto","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K.","family":"Moji","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M.O.","family":"Sato","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.","family":"Waikagul","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2014,4,17]]},"reference":[{"key":"S0022149X14000261_ref25","doi-asserted-by":"publisher","DOI":"10.1007\/s10393-012-0789-z"},{"key":"S0022149X14000261_ref21","doi-asserted-by":"publisher","DOI":"10.1016\/j.actatropica.2005.08.008"},{"key":"S0022149X14000261_ref8","first-page":"623","article-title":"Comparative studies on the morphology of the eggs of Opisthorchis viverrini and lecithodendriid trematodes","volume":"22","author":"Kaewkes","year":"1991","journal-title":"Southeast Asian Journal of Tropical Medicine and Public Health"},{"key":"S0022149X14000261_ref12","doi-asserted-by":"publisher","DOI":"10.1016\/j.exppara.2005.09.012"},{"key":"S0022149X14000261_ref19","doi-asserted-by":"publisher","DOI":"10.1016\/j.actatropica.2003.08.002"},{"key":"S0022149X14000261_ref26","doi-asserted-by":"publisher","DOI":"10.3347\/kjp.2010.48.3.225"},{"key":"S0022149X14000261_ref10","first-page":"128","article-title":"An epidemiological study on Opisthorchis viverrini infection in Lao villages","volume":"31","author":"Kobayashi","year":"2000","journal-title":"Southeast Asian Journal of Tropical Medicine and Public Health"},{"key":"S0022149X14000261_ref15","doi-asserted-by":"publisher","DOI":"10.3347\/kjp.2013.51.1.107"},{"key":"S0022149X14000261_ref13","doi-asserted-by":"publisher","DOI":"10.1128\/JCM.02011-08"},{"key":"S0022149X14000261_ref16","doi-asserted-by":"publisher","DOI":"10.1016\/j.actatropica.2008.09.015"},{"key":"S0022149X14000261_ref28","doi-asserted-by":"publisher","DOI":"10.1128\/JCM.40.10.3879-3880.2002"},{"key":"S0022149X14000261_ref22","doi-asserted-by":"publisher","DOI":"10.1016\/j.actatropica.2007.05.006"},{"key":"S0022149X14000261_ref1","doi-asserted-by":"publisher","DOI":"10.1146\/annurev.nutr.19.1.41"},{"key":"S0022149X14000261_ref2","first-page":"840","volume-title":"Hunter's tropical medicine and emerging infectious diseases","author":"Bunnag","year":"2000"},{"key":"S0022149X14000261_ref3","doi-asserted-by":"publisher","DOI":"10.1079\/JOH2005302"},{"key":"S0022149X14000261_ref4","doi-asserted-by":"publisher","DOI":"10.3347\/kjp.2007.45.3.213"},{"key":"S0022149X14000261_ref5","doi-asserted-by":"publisher","DOI":"10.3347\/kjp.2013.51.3.305"},{"key":"S0022149X14000261_ref6","doi-asserted-by":"publisher","DOI":"10.1645\/GE-2828.1"},{"key":"S0022149X14000261_ref7","doi-asserted-by":"publisher","DOI":"10.1016\/j.actatropica.2003.01.002"},{"key":"S0022149X14000261_ref9","first-page":"397","article-title":"A simple device for quantitative stool thick-smear technique in Schistosomiasis mansoni","volume":"14","author":"Katz","year":"1972","journal-title":"Revista do Instituto de Medicina Tropical de Sao Paulo"},{"key":"S0022149X14000261_ref11","first-page":"60","article-title":"Opisthorchiasis: a clinicopathologic study of 154 autopsy cases","volume":"9","author":"Koompirochana","year":"1978","journal-title":"Southeast Asian Journal of Tropical Medicine and Public Health"},{"key":"S0022149X14000261_ref14","first-page":"123","article-title":"Opisthorchiasis and intestinal fluke infections in northern Thailand","volume":"29","author":"Radomyos","year":"1998","journal-title":"Southeast Asian Journal of Tropical Medicine and Public Health"},{"key":"S0022149X14000261_ref18","doi-asserted-by":"publisher","DOI":"10.1016\/j.trstmh.2008.10.011"},{"key":"S0022149X14000261_ref20","doi-asserted-by":"publisher","DOI":"10.1007\/s00436-013-3346-y"},{"key":"S0022149X14000261_ref23","doi-asserted-by":"publisher","DOI":"10.1016\/j.actatropica.2009.03.002"},{"key":"S0022149X14000261_ref27","doi-asserted-by":"publisher","DOI":"10.1017\/S0031182001007235"},{"key":"S0022149X14000261_ref29","doi-asserted-by":"publisher","DOI":"10.1016\/j.actatropica.2013.03.016"},{"key":"S0022149X14000261_ref17","first-page":"28","article-title":"Copro-DNA diagnosis of Opisthorchis viverrini and Haplorchis taichui infection in an endemic area of Lao PDR","volume":"41","author":"Sato","year":"2010","journal-title":"Southeast Asian Journal of Tropical Medicine and Public Health"}],"container-title":["Journal of Helminthology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S0022149X14000261","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2019,4,20]],"date-time":"2019-04-20T22:22:41Z","timestamp":1555798961000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S0022149X14000261\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2014,4,17]]},"references-count":28,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2015,7]]}},"alternative-id":["S0022149X14000261"],"URL":"https:\/\/doi.org\/10.1017\/s0022149x14000261","relation":{},"ISSN":["0022-149X","1475-2697"],"issn-type":[{"value":"0022-149X","type":"print"},{"value":"1475-2697","type":"electronic"}],"subject":[],"published":{"date-parts":[[2014,4,17]]}}}