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Mixed infections with Opisthorchis viverrini and intestinal flukes in residents of Vientiane Municipality and Saravane Province in Laos

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Authors
Chai, J. Y.; Park, J. H.; Han, E. T.; Guk, S. M.; Shin, E. H.; Lin, A.; Kim, J. L.; Sohn, W. M.; Yong, T. S.; Eom, K. S.; Min, D. Y.; Hwang, E. H.; Phommmasack, B.; Insisiengmay, B.; Rim, H. J.
Issue Date
2005-09-13
Publisher
Cambridge University Press
Citation
J Helminthol. 2005 Sep;79(3):283-9.
Keywords
AdolescentAdultAgedAnthelmintics/therapeutic useChildChild, PreschoolFeces/parasitologyFemaleFood ParasitologyHumansIntestinal Diseases, Parasitic/drug therapy/epidemiology/parasitologyIntestines/parasitologyLaos/epidemiologyMaleMiddle AgedOpisthorchiasis/drug therapy/epidemiology/parasitologyParasite Egg CountPraziquantel/therapeutic usePrevalenceRural HealthTrematode Infections/drug therapy/*epidemiology/parasitology
Abstract
Faecal examinations for helminth eggs were performed on 1869 people from two riverside localities, Vientiane Municipality and Saravane Province, along the Mekong River, Laos. To obtain adult flukes, 42 people positive for small trematode eggs (Opisthorchis viverrini, heterophyid, or lecithodendriid eggs) were treated with a 20-30 mg kg(-1) single dose of praziquantel and purged. Diarrhoeic stools were then collected from 36 people (18 in each area) and searched for helminth parasites using stereomicroscopes. Faecal examinations revealed positive rates for small trematode eggs of 53.3% and 70.8% (average 65.2%) in Vientiane and Saravane Province, respectively. Infections with O. viverrini and six species of intestinal flukes were found, namely, Haplorchis taichui, H. pumilio, H. yokogawai, Centrocestus caninus, Prosthodendrium molenkampi, and Phaneropsolus bonnei. The total number of flukes collected and the proportion of fluke species recovered were markedly different in the two localities; in Vientiane, 1041 O. viverrini (57.8 per person) and 615 others (34.2 per person), whereas in Saravane, 395 O. viverrini (21.9 per person) and 155207 others (8622.6 per person). Five people from Saravane harboured no O. viverrini but numerous heterophyid and/or lecithodendriid flukes. The results indicate that O. viverrini and several species of heterophyid and lecithodendriid flukes are endemic in these two riverside localities, and suggest that the intensity of infection and the relative proportion of fluke species vary by locality along the Mekong River basin.
ISSN
0022-149X (Print)
Language
English
URI
http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=713360

http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&dopt=Citation&list_uids=16153322

http://hdl.handle.net/10371/29771
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College of Medicine/School of Medicine (의과대학/대학원)Parasitology and Tropical Medicine (기생충학전공)Journal Papers (저널논문_기생충학전공)
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