Korean J Parasitol.  2007 Sep;45(3):199-204. 10.3347/kjp.2007.45.3.199.

Gynaecotyla squatarolae (Digenea: Microphallidae) from rats experimentally infected with metacercariae from the shore crab, Macrophthalmus dilatatus

Affiliations
  • 1Department of Parasitology, College of Medicine, Dankook University, Cheonan, Korea. bbbenji@freechal.com
  • 2Department of Parasitology, and Tropical Medicine Seoul National University College of Medicine, and Institute of Endemic Diseases, Seoul National University Medical Research Center, Seoul, Korea.
  • 3Department of Bio-Medical College of Medicine, Dankook University, Cheonan, Korea.

Abstract

Metacercariae of Gynaecotyla squatarolae (Digenea: Microphallidae) were discovered from the shore crab, Macrophthalmus dilatatus, purchased at a market in a coastal town of Taean-Eup, Chungcheongnam-do, Republic of Korea. Their adult flukes were confirmed by experimental infection of rats. The metacercariae of G. squatarolae were elliptical (391.1 x 362.5 micrometer), and the excysted metacercariae had progenetic genital organs, including the ovary and testes. To obtain adult flukes, 6 Sprague-Dawley rats were fed 500 metacercariae each, and killed at days 2, 4, and 6 post-infection. The adult flukes were identified as G. squatarolae (Yamaguti, 1934) Yamaguti, 1939, based on morphological characters, including 2 ventral suckers (1 large and 1 small), a large genital atrium equipped with the cirrus and the metraterm, separated male and female genital pores, a transversely long cirrus pouch, and extensive vitelline follicles. In the present study, it has been first proven that the shore crab M. dilatatus is a second intermediate host for G. squatarolae in the Republic of Korea.

Keyword

Gynaecotyla squatarolae; intestinal fluke; metacercaria; shore crab; Macrophthalmus dilatatus; rat(experimental)

MeSH Terms

Animals
Brachyura/*parasitology
Female
Host-Parasite Interactions
Korea
Life Cycle Stages/physiology
Male
Rats
Rats, Sprague-Dawley
Time Factors
Trematoda/*anatomy & histology/isolation & purification/*pathogenicity
Trematode Infections/parasitology/*veterinary
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