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Prevalence of Haplorchis taichui among humans and fish in Luang Prabang Province, Lao PDR
Sohn, W.M.,Yong, T.S.,Eom, K.S.,Min, D.Y.,Lee, D.,Jung, B.K.,Banouvong, V.,Insisiengmay, B.,Phommasack, B.,Rim, H.J.,Chai, J.Y. Verlag für Recht und Gesellschaft ; Elsevier 2014 Acta tropica Vol.136 No.-
This study confirmed the prevalence of the intestinal fluke Haplorchis taichui (Trematoda: Heterophyidae) among people and fish in Luang Prabang Province, Lao PDR. Fecal specimens were collected from 559 riparian people (229 males and 330 females), residing in 4 Districts (Luang Prabang, Xieng Ngeun, Pak Ou, and Nam Bak) and were examined by the Kato-Katz fecal smear technique. The overall helminth egg positive rate was 64.9%. The positive rate for small trematode eggs (STE), which may include H. taichui and other heterophyids, Opisthorchis viverrini, and lecithodendriids, was 15.2%. For recovery of adult helminths, 10 STE-positive people were treated with 40mg/kg praziquantel and 15mg/kg pyrantel pamoate, and then purged. Mixed infections with 3 Haplorchis species (H. taichui, H. pumilio, and H. yokogawai), a species of cestode (Taenia saginata), and several species of nematodes including Enterobius vermicularis and hookworms were found. The worm load for trematodes was exclusively high for H. taichui with an average of 7691 specimens per infected person, followed by H. yokogawai (8.3 specimens) and H. pumilio (4.1 specimens). Out of 207 freshwater fish (17 species) purchased in a market in Luang Prabang District, 138 (67%) harboured H. taichui metacercariae (metacercarial burden per fish; 520). Lower prevalence of fish and lower metacercarial density were observed for H. yokogawai (52% and 50 per fish, respectively) and H. pumilio (18% and 3 per fish, respectively). STE found in the surveyed population of Luang Prabang Province were verified to be those of intestinal fukes, particularly H. taichui.
Risk factors for Opisthorchis viverrini and minute intestinal fluke infections in Lao PDR, 2009-2011
Yoon, H.J.,Ki, M.,Eom, K.,Yong, T.-S.,Chai, J.-Y.,Min, D.-Y.,Rim, H.-J.,Sohn, W.-M.,Insisiengmay, B.,Phommasack, B. Allen Press, etc 2014 The American journal of tropical medicine and hygi Vol.91 No.2