title: Prevalence of the intestinal flukes Haplorchis taichui and H. yokogawai in a mountainous area of Phongsaly Province, Lao PDR.
abstract: Phongsaly Province, located in the northernmost area of Lao PDR, was previously suggested to be endemic for the liver fluke Opisthorchis viverrini infection. To confirm, or rule out, this suggestion, the Phonxay village in the Khoua District, Phongsaly Province, was selected for a survey. Ten volunteers (8 men and 2 women aged 31-57 years) who consumed raw freshwater fish and had gastrointestinal troubles were treated with a single dose of praziquantel (40 mg/kg) and pyrantel pamoate (10 mg/kg) and purged with magnesium sulfate to recover any worm parasites. Eight of the 10 volunteers expelled 1 or more species of trematodes, nematodes, or cestodes (worm positive rate; 80%). The worms were morphologically identified as H. taichui (861 worms from 8 people), H. yokogawai (59 from 6 people), Phaneropsolus bonnei (1 from 1 person), Trichostrongylus sp. (2 from 2 people), Ascaris lumbricoides (2 from 1 person), Enterobius vermicularis (11 from 3 people), and Taenia saginata (1 strobila with scolex from 1 person). The results indicate that the mountainous area of Phongsaly Province, Lao PDR, is not endemic for the liver fluke but endemic for intestinal flukes, in particular, Haplorchis taichui and H. yokogawai.
authors.affiliation: Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, Seoul, Korea. cjy@snu.ac.kr
authors.forename: Jong-Yil
authors.initials: JY
authors.lastname: Chai
authors.forename: Tai-Soon
authors.initials: TS
authors.lastname: Yong
authors.forename: Keeseon S
authors.initials: KS
authors.lastname: Eom
authors.forename: Duk-Young
authors.initials: DY
authors.lastname: Min
authors.forename: Eun-Hee
authors.initials: EH
authors.lastname: Shin
authors.forename: Virasack
authors.initials: V
authors.lastname: Banouvong
authors.forename: Bounnaloth
authors.initials: B
authors.lastname: Insisiengmay
authors.forename: Sithat
authors.initials: S
authors.lastname: Insisiengmay
authors.forename: Bounlay
authors.initials: B
authors.lastname: Phommasack
authors.forename: Han-Jong
authors.initials: HJ
authors.lastname: Rim
mesh_terms: D000328:Adult; D000818:Animals; D000977:Antiparasitic Agents / Q000008:administration & dosage; D005243:Feces / Q000469:parasitology; D005260:Female; D006578:Heterophyidae / Q000033:anatomy & histology / Q000145:classification / Q000302:isolation & purification*; D006801:Humans; D007812:Laos / Q000453:epidemiology; D008297:Male; D008875:Middle Aged; D011223:Praziquantel / Q000008:administration & dosage; D015995:Prevalence; D011716:Pyrantel Pamoate / Q000008:administration & dosage; D014201:Trematode Infections / Q000188:drug therapy / Q000453:epidemiology* / Q000469:parasitology*
chemical_list: D000977:Antiparasitic Agents; D011223:Praziquantel; D011716:Pyrantel Pamoate