Korean J Parasitol.  2009 Mar;47(1):25-29. 10.3347/kjp.2009.47.1.25.

Indochinamon ou (Crustacea: Potamidae) as a New Second Intermediate Host for Paragonimus harinasutai in Luang Prabang Province, Lao PDR

  • 1Department of Parasitology and Institute of Health Science, Gyeongsang National University College of Medicine, Jinju 660-751, Korea.
  • 2Department of Parasitology, Hanyang University College of Medicine, Seoul 133-791, Korea. dymin@hanyang.ac.kr
  • 3Korea Association of Health Promotion, Seoul 157-704, Korea.
  • 4Department of Parasitology, Faculty of Medical Sciences, National University of Laos, Vientiane, Lao PDR.
  • 5Malaria Center, Luangprabang, Lao PDR.


Paragonimus harinasutai metacercariae were found in a species of freshwater crab, Indochinamon ou, collected in a small stream of Namback District, Luang Prabang Province, Lao PDR. Adult flukes were recovered after experimental infection of the metacercariae to dogs. Metacercariae were round or slightly elliptical, 0.666 x 0.626 mm in average size, and had a thin cyst wall of about 20 microm in thickness, a black excretory bladder, convoluted ceca, and some pinkish materials in the body. Adults were somewhat elongated, 95.2 x 36.5 mm in average size, covered with single-tipped tegumental spines, had a smaller oral sucker than the ventral sucker, a moderately branched ovary, and 5-6 lobulated testes. Eggs were ovoid and bilaterally symmetrical in shape, 79 x 45 microm in average size, and had a uniformly thickened shell. By the present study, it has been confirmed that I. ou is a new second intermediate host for P. harinasutai.


Paragonimus harinasutai; Indochinamon ou; crab; new intermediate host; Luang Prabang; Lao PDR
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