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dc.contributor.authorM. Satoen_US
dc.contributor.authorT. Pongvongsaen_US
dc.contributor.authorS. Sanguankiaten_US
dc.contributor.authorT. Yoonuanen_US
dc.contributor.authorJ. Kobayashien_US
dc.contributor.authorB. Bouphaen_US
dc.contributor.authorF. Nishimotoen_US
dc.contributor.authorK. Mojien_US
dc.contributor.authorM. O. Satoen_US
dc.contributor.authorJ. Waikagulen_US
dc.contributor.otherNiigata University School of Medicineen_US
dc.contributor.otherStation of Malariologyen_US
dc.contributor.otherMahidol Universityen_US
dc.contributor.otherUniversity of the Ryukyusen_US
dc.contributor.otherInstitute of Public Healthen_US
dc.contributor.otherNational Institutes for the Humanities, Research Institute for Humanity and Natureen_US
dc.contributor.otherUniversidade Federal do Tocantinsen_US
dc.identifier.citationJournal of Helminthology. Vol.89, No.4 (2015), 439-445en_US
dc.description.abstract© Cambridge University Press 2014. The liver fluke, Opisthorchis viverrini, and the minute intestinal fluke, Haplorchis taichui, are prevalent in many Asian countries. This study analysed the patterns of infections of O. viverrini and H. taichui 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 H. taichui and 65 (31.4%) for O. viverrini. Both these species co-exist in the study villages. When each parasite was analysed separately, H. taichui infections reached a plateau among people aged >20 years. Opisthorchis viverrini infection rates were highest in the age group 21-30 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 O. viverrini 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 O. viverrini infection. By contrast, H. taichui 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 O. viverrini infection.en_US
dc.rightsMahidol Universityen_US
dc.subjectAgricultural and Biological Sciencesen_US
dc.subjectImmunology and Microbiologyen_US
dc.titlePatterns of trematode infections of Opisthorchis viverrini (Opisthorchiidae) and Haplorchis taichui (Heterophyidae) in human populations from two villages in Savannakhet Province, Lao PDRen_US
Appears in Collections:Scopus 2011-2015

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