Parasites, Hosts and Diseases

The Korea Society for Parasitology and Tropical Medicine (대한기생충학·열대의학회)
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Prevalence of the Intestinal Flukes Haplorchis taichui and H. yokogawai in a Mountainous Area of Phongsaly Province, Lao PDR

  • Chai, Jong-Yil (Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center) ;
  • Yong, Tai-Soon (Department of Parasitology, Yonsei University College of Medicine) ;
  • Eom, Kee-Seon S. (Department of Parasitology, Chungbuk National University College of Medicine) ;
  • Min, Duk-Young (Department of Microbiology and Immunology, Eulji University School of Medicine) ;
  • Shin, Eun-Hee (Department of Parasitology and Tropical Medicine, Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center) ;
  • Banouvongs, Virasack (Malaria Center, Provincial Health Department) ;
  • Insisiengmay, Bounnaloth (Department of Hygiene and Prevention, Ministry of Public Health,) ;
  • Insisiengmay, Sithat (Department of Hygiene and Prevention, Ministry of Public Health,) ;
  • Phommasack, Bounlay (Department of Hygiene and Prevention, Ministry of Public Health,) ;
  • Rim, Han-Jong (Department of Parasitology, Korea University College of Medicine)
  • Received : 2010.09.24
  • Accepted : 2010.11.23
  • Published : 2010.12.31
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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 mglkg) 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 taichuiand H. yokogawai.

Keywords

References

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